List - I List - II A) The number of ways of not selecting (n-r) things from n different things I) 1+n+{ }^{n} {C}_{2}+. . .+{ }^{n} {C}_{r} B) (n-r+1) \cdot{ }^{n} {C}_{r-1} II)(r+1) \cdot{ }^{n} {C}_{r+1} C) The number of ways of selecting atleast (n-r) things from n different things III)r \cdot{ }^{n} {C}_{r} D)(n-r)((n-1) {C}_{r-1}+(n-1) {C}_{r}) IV)2^{n}-1-n-{ }^{n} {C}_{2}-. . .-{ }^{n} {C}_{r} V){ }^{n} {C}_{n-r} The correct match is:

Correct Answer is : A B C D V III I II

\text{ A } \text{ B } \text{ C } \text{ D } \text{ V } \text{ III } \text{ IV } \text{ II }

\text{ A } \text{ B } \text{ C } \text{ D } \text{ I } \text{ II } \text{ IV } \text{ III }

\text{ A } \text{ B } \text{ C } \text{ D } \text{ V } \text{ III } \text{ I } \text{ II }

\text{ A } \text{ B } \text{ C } \text{ D } \text{ I } \text{ V } \text{ IV } \text{ III }

TS EAMCET 18-July-2022 Shift 1 Solved Paper

Section: Mathematics

Question : 17 of 160

Marks: +1, -0

List - I	List - II
A) The number of ways of not selecting (n−r) things from n different things	I) 1+n+‌nC2+...+‌nCr
B) (n−r+1)⋅‌nCr−1	II)(r+1)⋅‌nCr+1
C) The number of ways of selecting atleast (n−r) things from n different things	III)r⋅‌nCr
D)(n−r)((n−1)Cr−1+(n−1)Cr)	IV)2n−1−n−‌nC2−...−‌nCr
	V)‌nCn−r

The correct match is:

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