NCERT class 11 maths chapter 16 Probability
Question 1:A box contains 10 red marbles, 20 blue marbles and 30 green marbles. 5 marbles are drawn from the box, what is the probability that (i) all will be blue? (ii) atleast one will be green?
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Question 2:4 cards are drawn from a well – shuffled deck of 52 cards. What is the probability of obtaining 3 diamonds and one spade?
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Question 3:A die has two faces each with number ‘1’, three faces each with number ‘2’ and one face with number ‘3’. If die is rolled once, determine (i) P(2) (ii) P(1 or 3) (iii) P(not 3)
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Question 4:In a certain lottery 10,000 tickets are sold and ten equal prizes are awarded. What is the probability of not getting a prize if you buy (a) one ticket (b) two tickets (c) 10 tickets.
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Question 5:Out of 100 students, two sections of 40 and 60 are formed. If you and your friend are among the 100 students, what is the probability that (a) you both enter the same section? (b) you both enter the different sections?
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Question 6:Three letters are dictated to three persons and an envelope is addressed to each of them, the letters are inserted into the envelopes at random so that each envelope contains exactly one letter. Find the probability that at least one letter is in its proper envelope.
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Question 7:A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P(A Ç B) = 0.35. Find (i) P(A È B) (ii) P(A´ Ç B´) (iii) P(A Ç B´) (iv) P(B Ç A´)
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Question 8:From the employees of a company, 5 persons are selected to represent them in the managing committee of the company. Particulars of five persons are as follows: S. No. Name Sex Age in years
NCERT class 11 maths chapter 16 Probability
Question 1:Harish M 30
Exercise Miscellaneous maths class 11 Chapter 16 Probability
Question 2:Rohan M 33
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Question 3:Sheetal F 46
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Question 4:Alis F 28
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Question 5:Salim M 41 A person is selected at random from this group to act as a spokesperson. What is the probability that the spokesperson will be either male or over 35 years?
Miscellaneous Exercise on Chapter 161. A box conta
Question 9:If 4-digit numbers greater than 5,000 are randomly formed from the digits 0, 1, 3, 5, and 7, what is the probability of forming a number divisible by 5 when, (i) the digits are repeated? (ii) the repetition of digits is not allowed?
Question 10:The number lock of a suitcase has 4 wheels, each labelled with ten digits i.e., from 0 to 9 The lock opens with a sequence of four digits with no repeats. What is the probability of a person getting the right sequence to open the suitcase?
