A box contains 15 green and 10 yellow balls. If 10 balls are randomly drawn, one-by-one, with replacement, then the variance of the number of green balls drawn is :
As we have learned
Binomial Distribution(Statistical) -
-
Variance = npq
Where n = 10
p = probability of drwing green balls
= 15/25 = 3/5
q = 1-p = 2/5
Variance =
Option 1)
Option 2)
Option 3)
Option 4)
Study 40% syllabus and score up to 100% marks in JEE