Advertisements
Advertisements
Question
A bag contains twenty Rs 5 coins, fifty Rs 2 coins and thirty Re 1 coins. If it is equally likely that one of the coins will fall down when the bag is turned upside down, what is the probability that the coin will be a Re 1 coin?
Solution
Total number of coins = 20 + 50 + 30 = 100
Total possible outcomes = 100 = n(S)
Number of favorable outcomes for Re 1 coins = 30 = n(E)
Probability (Re 1 coin) = `( n(E))/(n(S)) = 30/100 = 3/10 `
APPEARS IN
RELATED QUESTIONS
A child has a die whose six faces shows the letters as given below:
| A | B | C | D | E | A |
The die is thrown once. What is the probability of getting (i) A? (ii) D?
Fill in blank:
Probability of a sure event is...........
A bag contains twenty Rs 5 coins, fifty Rs 2 coins and thirty Re 1 coins. If it is equally likely that one of the coins will fall down when the bag is turned upside down, what is the probability that the coin will not be a Rs 2 coin?
Offices in Delhi are open for five days in a week (Monday to Friday). Two employees of an office remain absent for one day in the same particular week. Find the probability that they remain absent on different days.
Out of 200 students from a school, 135 like Kabbaddi and the remaining students do not like the game. If one student is selected at random from all the students, find the probability that the student selected dosen't like Kabbaddi.
A number is selected at random from the numbers 1 to 30. What is the probability that the selected number is a prime number?
A child has a die whose six faces show the letters as given below:
| A | B | C | D | E | F |
The die is thrown once. The probability of getting a ‘D’ is ____________.
A letter of English alphabets is chosen at random. What is the probability that it is a letter of the word ‘MATHEMATICS’?
All the jacks, queens and kings are removed from a deck of 52 playing cards. The remaining cards are well shuffled and then one card is drawn at random. Giving ace a value 1 similar value for other cards, find the probability that the card has a value 7
Two dice are thrown at the same time. What is the probability that the sum of the two numbers appearing on the top of the dice is less than or equal to 12?
