JEE Math Practice Question
Box I contains 30 cards numbered 1 to 30 and Box II contains 20 cards numbered 31 to 50. A box is selected at random and a card is drawn from it. The number on the card is found to be a non-prime number. The probability that the card was drawn from Box I is :
- A.$${8 \over {17}}$$
- B.$${2 \over 3}$$
- C.$${2 \over 5}$$
- D.$${4 \over {17}}$$
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