Question

A shopkeeper has hundred memory cards in a box among them 15 Memory Cards are defective, when a person come to the shop to buy a memory card the shopkeeper drew a card at random from the box then
(i)what is the probability that this card is defective
(ii) after drawing the first card which is defective it is not placed that in the box then other card is drawn at random what is the probability that this card is not defective​

Answer 1

Answer:

(i)= 3/20 (ii)= 21/25

Step-by-step explanation:

no of defective cards are 15 ,total cards are 100 so it is 15/100= 3/20 , as one card is not replaced it is 84/100= 21/25

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