A member of a book club wishes

to purchase two books from a

selection of eight books

recommended for a certain

month. In how many ways can

she choose them?

Note: Cr=

n

n!

r!(n=r)!

Enter

to purchase two books from a

selection of eight books

recommended for a certain

month. In how many ways can

she choose them?

Note: Cr=

n

n!

r!(n=r)!

Enter

book clubwishes to purchase two books from a selection of eight books recommended for acertain month.There are a total of 28 ways.Factorial, in mathematics, the product of all positive integers less than or equal to a given positive integer and denoted by that integer and an systematic interjection point. therefore,factorialseven is written 7(seven)!, meaning 1(one) × 2 × 3 × 4 × 5 × 6 × 7.Factorialzero(0) is defined as equal to 1(one).factorialof a number, multiply the number with thefactorialvalue of the former number (five or six or any). For illustration, to know the value of 6(six)! multiply 120(one hundred twenty)( thefactorialof 5) by 6, and get 720(seven hundred twenty). For 7(seven)!factorialfunction( symbol!) says to multiply all whole figures from our chosen number down to 1(one).factorialhere: