Question

# There is a 30% chance of rain and a 70% chance of shine. If it rains, there is a 50% chance that Bob will cancel his picnic, but if the sun is shining, he will definitely have his picnic. What is the percentage chance that Bob will have his picnic?

A
65
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
B
75
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
C
55
No worries! Weâ€˜ve got your back. Try BYJUâ€˜S free classes today!
D
85
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

## The correct option is D 85There is a 30% chance of rain and a 70% chance of shine. If it rains, there is a 50% chance that Bob will cancel his picnic, but if the sun is shining, he will definitely have his picnic. 50% chance that Bob will cancel his picnic in case of a rain means that there is 50% chance that Bob will NOT cancel his picnic in case of a rain. So, P(E)=0.3∗0.5+0.7∗1=0.85 or 85%.

Suggest Corrections
0
Join BYJU'S Learning Program
Select...
Related Videos
MATHEMATICS
Watch in App
Explore more
Join BYJU'S Learning Program
Select...