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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 ...

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Asked: September 4, 2020In: NCERT 11th Maths

7. A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P( A ∩ B ) = 0.35. Find (i) P( A ∪ B ) (ii) P( A ́ ∩ B ́ ) (iii) P ( A ∩ B ́ ) (iv) P( B ∩ A ́ )

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Asked: September 4, 2020In: NCERT 11th Maths

6. Three letters are dictated to three persons and an evelope 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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Asked: September 4, 2020In: NCERT 11th Maths

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

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(a) you both enter the same section? (b) you both enter the different sections?

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eduhilfe

Asked: September 4, 2020In: NCERT 11th Maths

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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eduhilfe

Asked: September 4, 2020In: NCERT 11th Maths

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

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(i) P(2) (ii) P(1 or 3) (iii) P(not 3)

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Asked: September 4, 2020In: NCERT 11th Maths

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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eduhilfe

Asked: September 4, 2020In: NCERT 11th Maths

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

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(i) all will be blue? (ii) atleast one will be green?

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?

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,

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:

7. A and B are two events such that P(A) = 0.54, P(B) = 0.69 and P( A ∩ B ) = 0.35. Find (i) P( A ∪ B ) (ii) P( A ́ ∩ B ́ ) (iii) P ( A ∩ B ́ ) (iv) P( B ∩ A ́ )

6. Three letters are dictated to three persons and an evelope 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.

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

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.

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

2. 4 cards are drawn from a well – shuffled deck of 52 cards. What is the probability of obtaining 3 diamonds and one spade?

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

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