wiz-icon
MyQuestionIcon
MyQuestionIcon
7
You visited us 7 times! Enjoying our articles? Unlock Full Access!
Question

In Class XI of a school 40% of the students study Mathematics and 30% study Biology, 10% of the class study both Mathematics and Biology. If a student is selected at random from the class, find the probability that he will be studying Mathematics or Biology.

Open in App
Solution

Let A be the event in which the selected student studies Mathematics and B be the event in which the selected student studies Biology
Accordingly P(A)=40% =40100=25
P(B)=30% =30100=310
P(AorB)=10% =10100=110
We know that P(AorB)=P(A)+P(B)P(A and B)
P(AorB)=25+310110=610=0.6
Thus the probability that the selected student will be studying Mathematics or Biology is 0.6

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Multiplication Rule
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon