Question

Nishtha has a Rs. 1 coin, a Rs 2 coin, a Rs 5 coin and a Rs 10 coin her purse. She needs to pay for a pencil that costs Rs.4. State the probability of her using the Rs. 5 coin.

Answer 1

Solution:

Given: Nishtha has a Rs. 1 coin, a Rs 2 coin, a Rs 5 coin and a Rs 10 coin her purse. She needs to pay for a pencil that costs Rs.4.

To find:
The probability of her using the Rs. 5 coin.

Let A be the probability of the event , of using Rs.5 coin to buy the pencil is

P(A)=$\frac{n(a)}{n(s)}$
here, n(s)=2 that,she can use a  Rs.5 coin or Rs.10 coin in her purse (if Rs.10 is accepted by the shopkeeper,as today it is not in use , because of duplicately minted Rs.10 coins.),she can't use Rs. 1 or Rs. 2 coin because,she has only one coin each  which is not sufficient to buy a Rs.4 pencil.
=$\frac{1}{2}$

            Hope it Helps

Answer 2

1/2
I hope this will be helpful
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