The value of \\sum_{ {r}=0}^{20}{ }_{0}^{50- {r}} {C}_{6} is equal to : [4 Sep 2020 Shift 1]

Correct Answer is : 51C7−30C7

{ }^{51} {C}_{7}+{ }^{30} {C}_{7}

{ }^{51} {C}_{7}-{ }^{30} {C}_{7}

{ }^{50} {C}_{7}-{ }^{30} {C}_{7}

{ }^{50} {C}_{6}-{ }^{30} {C}_{6}

Binomial Theorem Part 1

Section: Mathematics

Question : 31 of 100

Marks: +1, -0

The value of

∑

r=0

‌050− rC6 is equal to :

[4 Sep 2020 Shift 1]

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