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There are 10 cards. Each card has one number between 1 and 10, so that every number from 1 to 10 appears once.

In which distributions does the variable X have a binomial distribution?

Select each correct answer.

 

When a card is chosen at random with replacement six times, X is the number of times a 3 is chosen.

 

When a card is chosen at random with replacement five times, X is the number of times a prime number is chosen.

 

When a card is chosen at random without replacement three times, X is the number of times an even number is chosen.

 

When a card is chosen at random with replacement multiple times, X is the number of times a card is chosen until a 5 is chosen.

jbouyer  Mar 22, 2018
 #1
avatar+503 
+1

1. P(x>= 2) = 1-(.03+.09) = .88
4.  z = (12.2-14)/1.2

5.  x = 1.5(2.4) + 54 
6. invNOrm(.60) = .2533, x = .2533(50) + 400 = 413
7. z = (25-24)/1.3 = .77 P(z<= .77) = .779
.779(1200) = 935

Lightning  Mar 22, 2018
 #2
avatar
0

can you please tell me the answer

Guest Mar 22, 2018

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