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 to be a non - prime number the probabilty that the card was drawn from Box I is :

Box-1 contains 30 cards marked from 1 to 30 and Box-2 contains 20 cards amked from 31 to 50. A box is selected and a card is drawn. If the number on the card is non-prime then what is the probability that it came from Box 1.

Cards marked with numbers 5 to 50 are placed in a box and mixed thoroughly,A card is drawn from the box at random.Find the probability that the number

Box 1 contains three cards bearing numbers 1, 2, 3; box 2 contains five cards bearing numbers 1, 2, 3,4, 5; and box 3 contains seven cards bearing numbers 1, 2, 3, 4, 5, 6, 7. A card is drawn from each of the boxes. Let x_i be the number on the card drawn from the ith box, i = 1, 2, 3. The probability that x_1+x_2+x_3 is odd is The probability that x_1, x_2, x_3 are in an aritmetic progression is

A box contains 90 discs,numbered from 1 to 90. If one disc is drawn at random from the box,find the probability that it bears a prime number <23 .

A box contains cards numbered 6 to 50. card is drawn at random from the box. The probability that the drawn card has a number which is a perfect square is

In a bag contains 20 cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is (i) divisibly by 2or 3(ii) a prime number

A box contains cards numbered from 11 to 123. A card is drawn at random from the box. Find the probability that the number on the drawn card is: A square number

A box contains cards numbered from 11 to 123. A card is drawn at random from the box. Find the probability that the number on the drawn card is: a multiple of 7.

17 cards numbered 1,2,3,4, ….., 17 are put in a box and mixed thoroughly. A card is drawn at random from the box. Find the probability that the card drawn bears (i) an odd number (ii) a number divisible by 5.

Cards numbered from 7 to 49 are put in a box & mixed through . A card is drawn from the box , what is the probability that the number written on it is : A prime number A multiple of 7 .