Short Answer TypeCards marked with numbers 3,4, 5,.....,50 are placed in a box and mixed throughly. One card is drawn at random from the box. Find the probability that number on the drawn card is
(i) divisible by 7
(ii) a number which is a square.
Total no. of cards : 10 i.e., n(S) = 10
Let A be the favourable outcomes of getting a card with numbers less than 10, then
A = {6, 7, 8, 9}
i.e., n(A) = 4
Therefore,
P(A) = 
A box has cards numbered 14 to 99. Cards are mixed thoroughly and a card is drawn from the bag at random. Find the probability that the number on the card, drawn from the box is
(i) an odd number,
(ii) a perfect square number,
(iii) a number divisible by 7.
Two unbiased coins are tossed simultaneously. Calculate the probability of getting
(i) exactly one tail.
(ii) exactly two heads.
Two unbiased coins are tossed. Calculate the probability of getting
(i) At least two tails.
(ii) At most two tails.
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