Need help with this hard probability question?
2 integers (from 1 - 30) are chosen by a random number generator. What is the probability that .. a) the numbers are both even b) one number is even and one is odd c) both numbers are less than 10 d) the same number is chosen twice
I need help on a probability question?
You roll 2 number cubes at the same time. Let X be a random variable that represents the sum of the numbers rolled. e. What is the probability that you roll a sum of 12 four times in a row? If this happened, would you question whether the number cubes are fair? I just need to know how to do e, I've done the rest but I just don't get 6e.
Probability (FST) Questions Need Help!!?
Let P be the probability of success. P=1/4 How? the probability of having a correct answer among four choices is 1/4 Therefore, the probability of failure is 3/4 Q=3/4 Using binomial distribution we have B= (10Cx)[(1/4)^x](3/4)^(10-x) Problem looks for the probability that AT LEAST THREE QUESTIONS ARE CORRECT, so our random variable is 3 to 10. B = ∑(10Cx)[(1/4)^x](3/4)^(10-x) ------- x from 3 to 10 B = 0.4744 (answer) or you may use 1-∑(10Cx)[(1/4)^x](3/4)^(10-x) ------- x from 0 to 2 it is a shorter way if you will solve this without the aid of high kind of calculator. If your calculator has summation function (like mine), then its great. EI HERE'S THE ERROR. YOU EVALUATE X=3, WHICH IS A PART OF THE SOLUTION BUT NOT YET FINISHED. AGAIN, LET ME REMIND YOU THAT THE PROBLEM IS LOOKING FOR THE PROBABILITY THAT AT LEAST 3 CORRECT QUESTIONS. AT LEAST THREE MEANS YOU MAY GET 3, CORRECT ANSWERS, 4, 5, 6, 7, 8, 9, OR 10. SO YOU SUM THE BINOMIAL DISTRIBUTION FROM 3 TO 10. 0.25 IS THE PROBABILITY OF GETTING THREE CORRECT ANSWERS. hOW ABOUT GETTING 4? A 5? A 6? AND SO ON. YOU ADD THAT INDIVIDUAL PROBABILITIES TO GET THE PROBABILITY OF AT LEAST THREE CORRECT ANSWERS. gET IT??
Probability question. I need help?
Two childern are chosen at random form a large national sample that took the IQ test. What is the probability that the first child will fall fifteen IQ points away from the mean in either direction? What is the probability that both childern obtain IQ scores above 130? The mean is 100 and std is 15. Please break it down for me.
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Purchasing magazine reported the results of a survey in which buyers were asked a series of questions with regard to internet usage. One question asked was how they would use the internet if security and other issues could be resolved. 78% said they would use it for pricing information, 75% said they would use it to send purchase orders, & 70% said they would use it for purchase order acknowledgements. Assume that these percentages hold true for all buyers. A researcher randomly samples 10 buyers and asks them how they would use the internet if security and other issues could be resolved. a)What is the probability that exactly 7 of these buyers would use the internet for pricing information? b)What is the probability the all of the buyers would use the internet to send purchase orders? c)What is the probability that more than 6 would use the internet for purchase order acknowledgements? d) Find the expected valu who would use the internet for purchase order acknowledgements.
Need help on probability question please?
i keep getting this one wrong i dont understand it. Answer the questions below based on the following chart from which an observation is picked at random. http://i1217.photobucket.com/albums/dd392/Lilyjune15/charts.gif * Find the probability an observation is on a Thursday when the temperature is between 90 and 99. -85% -15% -33% -67% -0% -25% -100% -75% * Find the probability an observation is on a Monday when the temperature is less than 90. -67% -85% -75% -0% -15% -33% -100% -25% * Find the probability an observation is on a Friday when the temperature is greater than 89. -67% -0% -75% -15% -85% -100% -25% -33% * Find the probability that if the temperature is between 90 and 99, it will be a Thursday. -85% -25% -15% -100% -33% -75% -0% -67% * Find the probability that if the temperature is between 110 and 120, it will be a Sunday. -33% -100% -85% -0% -15% -25% -67% -75%
PLEASE I NEED HELP PROBABILITY QUESTION ok?
1) Find the probability of being dealt a 3-of-a-kind in poker. A 3-of-a-kind is (3 of one card and 2 other non-matching cards). Can you please explain how you got it so i can learn aswell. 2) Find the probability of being dealt 2 pairs in poker. Example (2233A - two pairs and one non-matching card). Can you please explain how you got it so i can learn aswell. Solve the above questions for a game of 6-card stud. In 6-card stud, you are dealt 6 cards and make your best possible 5-card hand.
Math question....need help..!! emergency ...probability question?
From a survey involving 1000 students at a large university, a market research company found that 750 students owned laptops , 450 owned cars, and 350 owned cars and laptops. If a student at the university is selected at random, what is the empirical probability that the student does not own a car..? please help...asap..
Probability Question I need help on...please show workings?
A box contains 10 colored light bulbs, 5 green, 3 red and 2 yellow. One light bulb is selected at random and put into the light fitting of room A. (a) What is the probability that the light bulb selected is (i) green? (ii) not green? A second light bulb is selected at random and put into the light fitting in room B. (b) What is the probability that (i) the second light bulb is green given the first light bulb was green (ii) both light bulbs were not green? (iii) one room had a green light bulb and the other room does not have a green light bulb? A third bulb is selected as random and put in the light fitting of room C. (c) what is the probability that (i) all 3 rooms have green light bulbs? (ii) only one room has a green light bulb? (iii) at least one room has a green light bulb?