Question

32 21. The probability of selecting a trouser from a lot of 200 trousers is 0.045. Find the number of defective trousers in the lot. ​

Answer 1

Answer:

total trousers 200

defective trousers be X

Probability of defective trousers be 0.045

probability = X/200

0.045 = X/200

X = 0.045 × 200

X =9000 ÷ 1000

therefore X = 9

Number of defective trousers

Answer 2

Given:

A lot of 200 pairs of trousers are given.

The probability of selecting a trouser is 0.045

To Find:

a number of defective trousers in the lot =?

Solution:

As we know,

Probability = No. of favorable events / total no of events

So, In this case

Probability of defective trouser = No of defective trouser / Total no of Trouser

⇒ 0.045 = No of defective trouser / 200

⇒ 0.045 × 200 = No. of defective trousers

⇒ 9 = No. of defective trousers

Hence, the No of defective trousers is 9.