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प्रश्न
Compute: `(6! - 4!)/(4!)`
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उत्तर
`(6! - 4!)/(4!)`
= `(6 xx 5 xx 4! - 4!)/(4!)`
= `(4!(6 xx 5 - 1))/(4!)`
= 30 – 1
= 29
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संबंधित प्रश्न
A teacher wants to select the class monitor in a class of 30 boys and 20 girls, in how many ways can the monitor be selected if the monitor must be a boy? What is the answer if the monitor must be a girl?
If numbers are formed using digits 2, 3, 4, 5, 6 without repetition, how many of them will exceed 400?
How many five-digit numbers formed using the digit 0, 1, 2, 3, 4, 5 are divisible by 3 if digits are not repeated?
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Write in terms of factorial:
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Find the value of: `(5(26!) + (27!))/(4(27!) - 8(26!)`
A hall has 12 lamps and every lamp can be switched on independently. Find the number of ways of illuminating the hall.
