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A bag contains 30 white balls and 10 red balls. 16 balls are drawn one by one randomly from the bag with replacement. If X be the number of white balls drawn, the   is equal to

a.

4

b.

c.

d.

3 



Question ID - 57147 | SaraNextGen Top Answer

A bag contains 30 white balls and 10 red balls. 16 balls are drawn one by one randomly from the bag with replacement. If X be the number of white balls drawn, the   is equal to

a.

4

b.

c.

d.

3 

1 Answer
127 votes
Answer Key / Explanation : (c) -

P (probability of getting white ball) =

q =   and n = 16

mean = np = 16. = 12  and

standard deviation =  =   =

127 votes


127