To find the number of different groups (a) within a larger group (b), use the formula b!/a!.(b-a)! where the ! sign indicates "factorial". In your problem b = 21 and a = 5 so we have 21!/(5!.16!) this simplifies to 21.20.19.18.17/5.4.3.2 cancelling leaves 21.19.3.17 ie 20349
There are 10560 possible committees.
The number of 7 letter permutations of the word ALGEBRA is the same as the number of permutation of 7 things taken 7 at a time, which is 5040. However, since the letter A is duplicated once, you have to divide by 2 in order to find out the number of distinct permutations, which is 2520.
20 is the answer because 6!/(6-3)!3!=6 times 5 times 4/3 times 2 times 1=20
A school has 18 classes with 35 students in each class. In order to reduce class size to 30, how many new classes must be formed?
2 groups. 2 x 3= 6
75
18
SNCC was formed to enable students to
There are 10560 possible committees.
20 x 19 x 18/3 x 2 = 1,140 groups
Tense could be a word that rhymes with fence and is formed from the principal parts of a verb (tense, tensed, tensed).
There are (10 x 9)/2 = 45 different possible pairs of 2 teachers. For each of these . . .There are (30 x 29)/2 = 435 different possible pairs of students.The total number of different committees that can be formed is (45 x 435) = 19,575 .
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Kidney & the liver.
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WHY!!!!!!!!!!!!!
1922