1
IIT-JEE 1982
MCQ (Single Correct Answer)
+2
-0.5
The value of the expression $$\,{}^{47}{C_4} + \sum\limits_{j = 1}^5 {^{52 - j}\,{C_3}} $$ is equal to
A
$${}^{47}{C_5}$$
B
$${}^{52}{C_5}$$
C
$${}^{52}{C_4}$$
D
none of these
2
IIT-JEE 1979
MCQ (Single Correct Answer)
+2
-0.5
$${}^n{C_{r - 1}} = 36,{}^n{C_r} = 84\,\,and\,\,{}^n{C_{r + 1}} = 126$$, then r is :
A
1
B
2
C
3
D
None of these.
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