Question

provany
7. In a college 25% students become fail in maths,
15% become fail in chemistry and 10% students
fail in maths and chemistry both. A student is
selected at random, then,
(i) what is the probability that he fails in maths
if he is fail in chemistry?
(ii) what is the probability that he fails in chem-
istry if he is fail in maths ?
(iii) what is the probability that he is fail in maths
or chemistry ?

​

Answer 1

Answer:

→ Let there be 100 students .

Students who failed in maths =25

Students we failed in both =10

⇒ Probability =

25

10

=

5

2

⇒(B)

Step-by-step explanation:

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