JEE Main2019Math
Q.
If some three consecutive coefficients in the binomial expansion of (x + 1)n in powers of x are in the ratio 2:15:70, then the average of these three coefficients is :
- A
625
- B
964
- C
232
- D
227
Solution
If some three consecutive coefficients in the binomial expansion of (x + 1)n in powers of x are in the ratio 2:15:70, then the average of these three coefficients is :
625
964
232
227