Discrete Mathematics MCQ Questions and answers

A

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Q. Amit must choose a seven-digit PIN number and each digit can be chosen from 0 to 9. How many different possible PIN numbers can Amit choose?

(A) 10000000
(B) 9900000
(C) 67285000
(D) 39654900

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Q. A head boy, two deputy head boys, a head girl and 3 deputy head girls must be chosen out of a student council consisting of 14 girls and 16 boys. In how many ways can they are chosen?

(A) 98072
(B) 27384
(C) 36428
(D) 44389

A

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Q. A drawer contains 12 red and 12 blue socks, all unmatched. A person takes socks out at random in the dark. How many socks must he take out to be sure that he has at least two blue socks?

(A) 18
(B) 35
(C) 28
(D) 14

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Q. When four coins are tossed simultaneously, in number of the outcomes at most two of the coins will turn up as heads.

(A) 17
(B) 28
(C) 11
(D) 43

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Q. How many numbers must be selected from the set {1, 2, 3, 4} to guarantee that at least one pair of these numbers add up to 7?

(A) 14
(B) 5
(C) 9
(D) 24

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Q. Find the sequence generated by 1/1−x2−x4.,assume that 1, 1, 2, 3, 5, 8,… has generating function 1/1−x−x2.

(A) 0, 0, 1, 1, 2, 3, 5, 8,…
(B) 0, 1, 2, 3, 5, 8,…
(C) 1, 1, 2, 2, 4, 6, 8,…
(D) 1, 4, 3, 5, 7,…

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Q. There are 70 patients admitted in a hospital in which 29 are diagnosed with typhoid, 32 with malaria, and 14 with both typhoid and malaria. Find the number of patients diagnosed with typhoid or malaria or both.

(A) 39
(B) 17
(C) 47
(D) 53

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Q. At a software company, skilled workers have been hired for a project. Out of 75 candidates, 48 of them were software engineer; 35 of them were hardware engineer; 42 of them were network engineer; 18 of them had skills in all three jobs and all of them had skills in at least one of these jobs. How many candidates were hired who were skilled in exactly 2 jobs?

(A) 69
(B) 14
(C) 32
(D) 8

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Q. In a renowned software development company of 240 computer programmers 102 employees are proficient in Java, 86 in C#, 126 in Python, 41 in C# and Java, 37 in Java and Python, 23 in C# and Python, and just 10 programmers are proficient in all three languages. How many computer programmers are there those are not proficient in any of these three languages?

(A) 138
(B) 17
(C) 65
(D) 49

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Q. In class, students want to join sports. 15 people will join football, 24 people will join basketball, and 7 people will join both. How many people are there in the class?

(A) 19
(B) 82
(C) 64
(D) 30

Discrete Mathematics MCQs with answers Page - 8

Q. Amit must choose a seven-digit PIN number and each digit can be chosen from 0 to 9. How many different possible PIN numbers can Amit choose?

Q. A head boy, two deputy head boys, a head girl and 3 deputy head girls must be chosen out of a student council consisting of 14 girls and 16 boys. In how many ways can they are chosen?

Q. A drawer contains 12 red and 12 blue socks, all unmatched. A person takes socks out at random in the dark. How many socks must he take out to be sure that he has at least two blue socks?

Q. When four coins are tossed simultaneously, in number of the outcomes at most two of the coins will turn up as heads.

Q. How many numbers must be selected from the set {1, 2, 3, 4} to guarantee that at least one pair of these numbers add up to 7?

Q. Find the sequence generated by 1/1−x2−x4.,assume that 1, 1, 2, 3, 5, 8,… has generating function 1/1−x−x2.

Q. There are 70 patients admitted in a hospital in which 29 are diagnosed with typhoid, 32 with malaria, and 14 with both typhoid and malaria. Find the number of patients diagnosed with typhoid or malaria or both.

Q. In class, students want to join sports. 15 people will join football, 24 people will join basketball, and 7 people will join both. How many people are there in the class?

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