Advertisements
Advertisements
Question
Evaluate the following.
`(3! + 1!)/(2^2!)`
Advertisements
Solution
`(3! + 1!)/(2^2!)`
`(3! + 1!)/(4!)`
`(3xx2xx1 + 1)/(4xx3xx2xx1)`
`= (6 + 1)/24`
`= 7/24`
APPEARS IN
RELATED QUESTIONS
Evaluate `(n!)/((n-r)!)` when n = 6, r = 2
In how many ways can the letters of the word PERMUTATIONS be arranged if the there are always 4 letters between P and S?
How many numbers of six digits can be formed from the digits 0, 1, 3, 5, 7 and 9 when no digit is repeated? How many of them are divisible by 10 ?
A coin is tossed three times and the outcomes are recorded. How many possible outcomes are there? How many possible outcomes if the coin is tossed four times? Five times? n times?
Evaluate each of the following:
6P6
Find x if `1/(6!) + 1/(7!) = x/(8!)`
If n is a positive integer, then the number of terms in the expansion of (x + a)n is:
The total number of 9 digit number which has all different digit is:
Choose the correct alternative:
The product of r consecutive positive integers is divisible b
The number of signals that can be sent by 6 flags of different colours taking one or more at a time is ______.
