Question

The number of terms in the expansion of $(x+y+z{)}^{10}$ is

• A. 66
• B. 142
• C. 11
• D. 110

Answer 1

Answer: (A)

Number of terms in the expansion of
$(x+y+z{)}^{10}$ is ${}^{(10+3-1)}{C}_{10}$
$={}^{12}{C}_{10}=12!/(2!10!)=66$