Question

find the total number of selections of 8 object out of 10 objects​

Answer 1

Answer:

The formula for combinations is generally n! / (r! (n -- r)!), where n is the total number of possibilities to start and r is the number of selections made. In our example, we have 52 cards; therefore, n = 52. We want to select 13 cards, so r = 13.

Answer 2

Answer:

The total no of selections = 45

Step-by-step explanation:

Given : No of objects = n=10

            no of objects to selection = r = 8

           no of selection of 8 objects = ?

Solution : No of selection of r objects out of n objects can be found by

               Combination = n factorial /(n-r)factorial x r factorial

                                     = 10 factorial/(10-8)factorial x 8 factorial

                                     = 10 x 9 x 8factorial/2 factorial x 8 factorial

                                     = 10x 9/2

                                     = 45 selections