wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

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

A
32
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
433
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
43
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 43
p=3040=34q=1040=14n=16
Mean, μ=np=16×34=12

Standard deviation, σ=npq=16×34×14=3
Hence, (mean of Xstandard deviation of X)=123=43

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Probability Distribution
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon