Question

pls ans ques no 74 ........

Answer 1

Answer:

200

Hello.  I hope this helps you.  Have a great day!!!

Step-by-step explanation:

# ways of selecting 6 with at least two from each part

= ( # ways 2 from A and 4 from B ) + ( # ways 3 from A and 3 from B ) + ( # ways 4 from A and 2 from B )

= ( # ways 2 from A ) × ( # ways 4 from B )

  + ( # ways 3 from A ) × ( # ways 3 from B )

  + ( # ways 4 from A ) × ( # ways 2 from B )

= $\displaystyle\binom52\binom54 + \binom53\binom53 + \binom54\binom52$

= 10 × 5  +  10 × 10  +  5 × 10   ( you could use Pascal's Triangle to get these numbers )

= 50 + 100 + 50

= 200