A class word has 40 student. 25 boys and 15 girls. a student of the class is selected at random as the monitor. find the probability of selecting a girl student as the monitor.
Answers
Answer: 15 / 40 or 3 / 8
Given,
Number of students = 40 .
Number of girls = 25
Number of boys = 40 - 25 = 15 .
So,
Probability of selecting a boy is required to be found.
Sample space is the class.
n ( S ) = 40
Number of favourable outcomes are 15 .
So,
Probability of selecting a boy = 15 / 40 = 3 / 8
Concept
Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
Given
1) Total Students = 40
2) Number of boys = 25
3) Number of girls = 15
Find
Probability of selecting a girl student as the monitor.
Solution
Total no of students = 40
Total no of girls = 15
P(girl as monitor ) = 15/40
= 3 * 5 /40
= 3/8
Probability of selecting a girl student as the monitor is 3/8
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