Permutations and combinations

Permutations and combinations

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科目:数学
Rose Y
2023-11-13
18 颗豆豆
1. 单选题
300 秒

From a group of 5 candidates you randomly choose a President and Vice-President. How many possible outcomes?

20

9

10

25

2. 单选题
300 秒

How many different committees can be formed, if the committee has 3 people and there is 12 students to select from?

36

220

660

1320

3. 单选题
300 秒

From a group of 7 men and 6 women, five persons are to be selected to form a committee with at least 3 men. In how many ways can it be done?

564

645

735

756

4. 单选题
300 秒

In how many different ways can the letters of the word "CORPORATION" be arranged so that the vowels always come together?

810

1440

2880

50400

5. 单选题
300 秒

In how many different ways can the letters of the word "LEADING" be arranged so that the vowels always come together?

360

480

720

5040

6. 单选题
300 秒

Out of 7 consonants and 4 vowels, how many words of 3 consonants and 2 vowels can be formed?

210

1050

25200

21400

7. 单选题
300 秒

In how many ways can the letters of the word "LEADER" be arranged?

72

144

360

720

8. 单选题
300 秒

In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?

159

194

205

209

9. 单选题
300 秒

How many 3-digit numbers can be formed from the digits 2,3,5,6,7 and 9, which are divisible by 5 and none of the digits is repeated?

5

10

15

20

10. 单选题
300 秒

How many 3-digit numbers are possible using the digits 0,1,4,5,7 and 9 if the numbers can only be used once?

100

120

180

200

11. 单选题
300 秒

How many 3-digit numbers are possible using the digits 0,1,4,5,7 and 9 if there is no restriction on how many times each number can be used?

90

120

160

180

12. 单选题
300 秒

In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women?

266

5040

11760

86400

13. 单选题
300 秒

A box contain 2 different white balls, 3 different black balls and 4 different red balls. 3 balls chosen from box, at least one black, how many selections?

32

48

64

96

14. 单选题
300 秒

In how many different ways can the letters of the word "DETAIL" be arranged so that the vowels occupy only the odd positions?

32

48

36

60

15. 单选题
300 秒

In how many ways a group of 5 men and 2 women be made out of a total of 7 men and 3 women?

63

90

126

45

16. 单选题
300 秒

How many 4-letter words with or without meaning, can be formed out of the letters of the word, "LOGARITHMS", if repetition of letters is not allowed?

40

400

5040

2520

17. 单选题
300 秒

In how many different ways can the letters of the word "MATHEMATICS" be arranged so that the vowels always come together?

10080

4989600

120960

None of these

18. 单选题
300 秒

In how many different ways can the letters of the word "OPTICAL" be arranged so that the vowels always come together?

120

720

4320

2160

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