The personnel manager for a commercial bank has interviewed five men and seven women for four managerial training positions available with her bank. If the final selection will include two men and two women, how many different combinations are possible?

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Answer:

210 different combinations are possible.

Step-by-step explanation:

Given that we need to choose two men from five men. The number of possible cases would be [tex]$ 5 \choose {2} $[/tex]  [tex]$ = {^5}\textrm{C}_{2} $[/tex]

Also, since we have to choose two men for the post from seven women.

We will have: [tex]$ 7 \choose 2 $[/tex]  [tex]$ = {^7}\textrm{C}_{2} $[/tex]

Note that: [tex]$ = {^n}\textrm{C}_{r} = \frac{n!}{(r!(n - r)!)} $[/tex]

[tex]$ \therefore {^5}\textrm{C}_{2} = \frac{5!}{(2!(5 - 2)!)} $[/tex]

[tex]$ = \frac{5!}{2! . 3!} = \textbf{10} $[/tex]

Also, [tex]$ {^7}\textrm{C}_{2} = \frac{7!}{(2!(7 - 2)!)} $[/tex]

[tex]$ = \frac{7!}{2! . 5!} = \textbf{21} $[/tex]

Since, we need two men and two women, we multiply the results.

= 10 X 21 = 210 which is the required answer.

Hence, the answer.

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