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

A fair die is rolled. The probability that the first time 1 occurs at an even throw, is

A
16
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
511
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
611
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
536
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 511
Let E be the event of getting 1 in a die.
P(E)=16 and P(¯E)=56
P(first time 1 occurs at the even throw)
=t2 or t4 or t6 or t8 . . . and so on
={P(¯E)P(E)}+{P(¯E)P(¯E)P(¯E)P(E)}+=(56)(16)+(56)3(16)+(56)5(16)+=53612536=511

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