Advertisements
Advertisements
Question
A bag contains 100 identical marble stones which are numbered 1 to 100. If one stone is drawn at random from the bag, find the probability that it bears a number divisible by 4 or 5.
Solution
Total number of possible outcomes = 100
Numbers which are divisible by 4 or 5 = 4, 5, 8, 10, 12, 15, 16, 20, 24, 25, 28, 30, 32, 35, 36, 40, 44, 45, 48, 50, 52, 55, 56, 60, 64, 65, 68, 70, 72, 75, 76, 80, 84, 85, 88, 90, 92, 95, 96, 100
Number of favorable outcomes = 40
P(number divisible by 4 or 5) = `40/100 = 2/5`
APPEARS IN
RELATED QUESTIONS
One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting a face card.
In a class, there are 18 girls and 16 boys. The class teacher wants to choose one pupil for class monitor. What she does, she writes the name of each pupil on a card and puts them into a basket and mixes thoroughly. A child is asked to pick one card from the basket. What is the probability that the name written on the card is the name of a boy?
A bag contains tickets numbered 11, 12, 13,..., 30. A ticket is taken out from the bag at random. Find the probability that the number on the drawn ticket is greater than 15 and a multiple of 5.
From a deck of 52 cards, all the face cards are removed and then the remaining cards are shuffled. Now one card is drawn from the remaining deck. Find the probability that the card drawn is a king of black color.
Cards marked with numbers 1, 2, 3 ......... 20 are well shuffled and a card is drawn at random. What is the probability that the number on the card is a perfect square?
Two dice are rolled once. Find the probability of getting such numbers on two dice whose product is a perfect square.
If P (A) and P (not A) are complementary events and P (A) = 0.15, then P (not A) = ?
The probability of getting a bad egg in a lot of 400 is 0.035. The number of bad eggs in the lot is ______.
A bag contains 10 red, 5 blue and 7 green balls. A ball is drawn at random. Find the probability of this ball being a red ball.
Three rotten apples are accidentally mixed with twelve good ones. One apple is picked at random. What is the probability that it is a good one?
