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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

Respuesta :

Answer: Option 'D' is correct.

Step-by-step explanation:

Since we have given that

[tex]P(\text{ getting a commemorative stamp})=0.16[/tex]

and

[tex]P(\text{getting a special delivery stamp})=0.18[/tex]

So, we need to find,

[tex]P(\text{getting either a commemorative or a special delivery stamp})\\=P(\text{getting a commemorative stamp})+P({\text{ getting a special delivery stamp})[/tex]

(∵they are independent events .)

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

So, option 'D' is correct.

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