Work sheet: Subject – Maths, Class – VIII Chapter: Probability
1. If a dice is thrown. What is the probability of getting: (i) an odd number (ii) a multiple of 3 (iii) a perfect square numbers (iv) a number less than 4? 2. Three unbiased coins are tossed together. Find the probability of getting: (i) all heads (ii) two heads (iii) one head (iv)At least two head [ hint : Possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH and TTT Ans: 1/8 , 3/8 , 3/8,1/2(HHH, HHT, HTH and THH)] 3. Find the probability that a leap year selected at random will contain 53 Sundays. [2/7] 4. One card is drawn from a pack of 52 cards, each of the 52 cards being equally likely to be drawn. Find the probability that the card drawn is : (i) an ace (ii) either red or king (iii) a face card (iv) a red face card) [Ans: 1/13, 7/13, 3/13,3/26] 5. Two dice are thrown simultaneously. Find the probability of getting: (i) a doublet i.e. same number on both dice. (ii) The sum as a prime number. [n=6 1/6,5/12] 6. If a die is thrown once, what is the probability of getting a prime number? 7. A coin is tossed 200times and tail is obtained 128 times. Now, if a coin is tossed at random, what is the probability of getting a tail? 8. In 100 throws of a dice, 5 is obtained 42 times. In a random throw, what is the probability of getting a 5? 9. A bag has 6 red balls and 8green balls. A ball is drawn from a bag without looking in to the bag. What is the probability of getting a green ball? 10. What is the probability of occurrence of an event?
7 Comments
Shivam
17/2/2017 06:53:59 am
So good questions
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Rf
27/10/2017 08:10:26 pm
Rw
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Atin
18/11/2017 02:21:27 am
Good
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Abhi
20/2/2018 08:39:10 am
thanks
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avneet dhaka
4/3/2018 09:19:27 pm
I like it ✌ 🤷🤦🙌👍😁💕👏👏👏👏👏👏👏👏👏
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