Advertisements
Advertisements
प्रश्न
A piggy bank contains hundred 50 p coins, seventy ₹1 coin, fifty ₹2 coins and thirty ₹5 coins. If it is equally likely that one of the coins will fall out when the bank is turned upside down, what is the probability that the coin will be a ₹1 coin?
उत्तर
Number of 50 p coins = 100.
Number of ₹1 coins = 70.
Number of ₹2 coins = 50.
Number of ₹5 coins = 30.
Thus, total number of outcomes = 250.
Let E1 be the event of getting a ₹1 coin.
Number of favourable outcomes = 70.
∴ P(getting a ₹1 coin) = P(E1) = `("Number of outcomes favourable to" E_1)/"Number of all possible outcomes"`
`= 70/250 = 7/25`
Thus, the probability that the coin will be a ₹1 coin is `7/25`.
APPEARS IN
संबंधित प्रश्न
Two different dice are tossed together. Find the probability that the product of the two numbers on the top of the dice is 6.
A bag contains 25 cards numbered from 1 to 25. A card is drawn at random from the bag. Find the probability that the number on the drawn card is:
(i) divisible by 3 or 5
(ii) a perfect square number
The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap?
A box contains cards bearing numbers from 6 to 70. If one card is drawn at random from the box, find the probability that it bears
(i) a one digit number.
(ii) a number divisible by 5.
(iii) an odd number less than 30.
(iv) a composite number between 50 and 70.
Two different dice are rolled simultaneously. Find the probability that the sum of numbers appearing on the two dice is 10 ?
Choose the correct alternative answer for the following question.
There are 40 cards in a bag. Each bears a number from 1 to 40. One card is drawn at random. What is the probability that the card bears a number which is a multiple of 5 ?
All the black face cards are removed from a pack of 52 cards. The remaining cards are well shuffled and then a card is drawn at random. Find the probability of getting king
All jacks, queens and kings are removed from a pack of 52 cards. The remaining cards are well-shuffled and then a card is randomly drawn from it. Find the probability that this card is a red card.
Two coins are tossed simultaneously. What is the probability of getting at least one head?
Two coins are tossed simultaneously. Find the probability of getting exactly one head.
In Q. No. 1, The probability that the digit is even is
The probability of throwing a number greater than 2 with a fair dice is
A box contains 90 discs, numbered from 1 to 90. If one disc is drawn at random from the box, the probability that it bears a prime number less than 23, is ______.
A card is drawn at random from a pack of 52 cards. The probability that the drawn card is not an ace is
A box contains a certain number of balls. Some of these balls are marked A, some are marked B and the remaining are marked C. When a ball is drawn at random from the box P(A) = `1/3` and P(B) = `1/4`. If there are 40 balls in the box which are marked C, find the number of balls in the box.
In a hockey team there are 6 defenders, 4 offenders and 1 goalee. Out of these, one player is to be selected randomly as a captain. Find the probability of the selection that – A defender will be selected.
When two coins are tossed, what is the probability that two heads are obtained?
One ticket is selected at random from 100 tickets numbered 0.0, 01, 02, ……, 99. Suppose x is the sum of digits and y is the product of digits, then the probability that x = 9 and y = 0 is ____________.
What is the probability that the minute and hour hands of a clock will form an acute angle at any given time?
A coin is tossed 12 times and the outcomes are observed as shown below:
The chance of occurrence of Head is
