Question

What is the probability that a stamp chosen at random is a commemorative or a special delivery stamp?

Definitive: 0.38
Commemorative: 0.16
Semipostal: 0.2
Airmail: 0.08
Special Delivery: 0.18

A) 0.03
B) 0.18
C) 0.16
D) 0.34

Answer 1

Answer: Option 'D' is correct.

Explanation:

Since we have given that

`P(\text{ getting a commemorative stamp})=0.16`

and

`P(\text{getting a special delivery stamp})=0.18`

So, we need to find,

`P(\text{getting either a commemorative or a special delivery stamp})\\=P(\text{getting a commemorative stamp})+P({\text{ getting a special delivery stamp})`

(∵they are independent events .)

`P(\text{getting either a commemorative or a special delivery stamp})\\=0.16+0.18\\=0.34`

So, option 'D' is correct.