Q. Assertion (A): Number of terms in the expansion of $(x + y + z)^{5}$ is 21.
Reason (R) : The number of terms in the expansion of $(x + y + z)^{n}$ is $^{(n + 2)} C_{2}$

1307 203 Binomial Theorem Report Error

A

Both A and R are true and R is the correct explanation of A

40%

B

Both A and R are true, but R is not the correct explanation of A

53%

C

A is true, but R is false

0%

D

A is false, but R is true

7%

Solution:

Use the formula $^{n + r - 1} c_{r - 1}$