CAT Quant Practice Problems

Question: What is the number of distinct terms in the expansion of $(a+b+c)^{20}$?
1. 231
2. 253
3. 242
4. 210
5. 228

Correct Option:1

The power is 20.

20 has to be divided among a, b and c. This can be done in $^{20+3-1}C_{3-1}$ = $^{22}C_2$ = 231

CAT Quant Questions with Video Solutions

CAT Quant Practice Problems