A shopkeeper has 100 memory cards in a box. Among then, 15 memory cards are defective. When a person came to the shop to buy a memory card, the shopkeeper drew a memory card at random from the box. Then,
what is the probability that this memory card is defective?

A shopkeeper has 100 memory cards in a box. Among them 15 memory cards Are defective when a person came to the shop to buy a memory cards, the shopkeeper draw a memory card at random from the box then (i) What is the probability that memory card is defective? (ii) After drawing the first memory card which is defective, it is not placed back in the box”. Then what is the probability that this memory card is not defective.

A box contains 100 electric bulbs. Out of them, 10 are defective bulbs. One bulb is taken out at random from this box. What is the probability that it is a non-defective bulb?

Cards marked with numbers 13,14,15…………,60 are placed in a box and mixed throughly. One card is drawn at random from the box. Find the probability that number on the card drawn is a perfect square.

One hundred cards are numbered from 1 to 100. The probability that a randomly chosen card has a digits 5 is

Cards marked with numbers 13,14,15…………,60 are placed in a box and mixed throughly. One card is drawn at random from the box. Find the probability that number on the card drawn is divisible by 5.

There are 40 students in Class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate cards, the cards being identical . Then she puts cards in a box and stirs them thoroughly. She then draws one card from the box.What is the probability that the name written on the card is the name of a girl

There are 40 students in Class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate cards, the cards being identical . Then she puts cards in a box and stirs them throughly. She then draws one card from the box.What is the probability that the name written on the card is the name of a boy?

Ten cards numbered 1 to 10 are placed in a box, mixed up thoroughly and then one card is drawn randomly. If it is known that the number on the drawn card is more than 3, what is the probability that it is an even number?

Kishore buys a fruit from a shop. The shopkeeper have one box. The box contain 18 mangoes, 32 apples so shopkeeper takes out one fruit at random what is the probability that the mango taken out from box.

There are 100 flash cards labelled from 1 to 100 in a bag. When a card is drawn from the bag at random, what is the probability of getting………. a card with prime number from possible outcomes?