Question

In group of 100 students, 40 are taking Maths, 30 are taking biology , and 20 are taking both algenra and biology.

Answer 1

Step-by-step explanation:

Given In group of 100 students, 40 are taking Maths, 30 are taking biology , and 20 are taking both maths and biology. What is the probability that a randomly selected student is taking maths or biology.

• Given from a group of 100 students number of students who opt for maths is 40, number of students who opt for biology is 30 and 20 are taking both.
• We need to find the probability that a randomly picked student chooses either maths or biology.
• So there are 100 students.
• Now probability of student taking maths will be 40 / 100 = 40%
• Also probability of student taking biology will be 30 / 100 = 30%
• So probability of both maths and biology will be 20 / 100 = 20%
• So probability of either maths or biology but not both will be
•                                                                 = 40 – 20 / 100 + 30 – 20 / 100
•                                                                   = 20 + 10 /  100
•                                                                      = 30 / 100
•                                                                        = 30%

Reference link will be

https://brainly.in/question/14906456