Advertisements
Advertisements
प्रश्न
If two coins are tossed once, what is the probability of getting at least one head.
उत्तर
When two coins are tossed together possible number of outcomes = {HH, TH, HT, TT}
n(S) = 4
E = event of getting at least one head = {HH, TH, HT}
n(E) = 3
Probability of getting at least one head = `(n(E))/(n(S)) = 3/4 `
APPEARS IN
संबंधित प्रश्न
A bag contains six identical black balls. A child withdraws one ball from the bag without looking into it. What is the probability that he takes out a white ball?
Hundred identical cards are numbered from 1 to 100. The cards are well shuffled and then a card is drawn. Find the probability that the number on the card drawn is a multiple of 5.
From 25 identical cards, numbered 1, 2, 3, 4, 5, ......, 24, 25; one card is drawn at random. Find the probability that the number on the card drawn is a multiple of 3.
From 25 identical cards, numbered 1, 2, 3, 4, 5, ......, 24, 25; one card is drawn at random. Find the probability that the number on the card drawn is a multiple of 3 or 5.
A card is drawn from a well-shuffled pack of 52 cards. Find the probability that the card drawn is 5 of heart or diamond.
A ball is drawn at random from a box containing 12 white, 16 red and 20 green balls. Determine the probability that the ball drawn is red or white.
A bag contains 3 red balls, 4 blue balls and 1 yellow ball, all the balls being identical in shape and size. If a ball is taken out of the bag without looking into it; find the probability that the ball is red.
From a well-shuffled deck of 52 cards, one card is drawn. Find the probability that the card drawn is a face card.
From a well-shuffled deck of 52 cards, one card is drawn. Find the probability that the card drawn is not a face card.
All the three face cards of spades are removed from a well-shuffled pack of 52 cards. A card is then drawn at random from the remaining pack. Find the probability of getting a queen.
