1
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

In how many ways 4 balls can be picked from 6 black and 4 green coloured balls such that at least one black ball is selected?

A
212
B
210
C
209
D
15
2
AP EAPCET 2021 - 19th August Evening Shift
MCQ (Single Correct Answer)
+1
-0

In how many ways can 9 examination papers be arranged so, that the best and the worst papers are never together?

A
9! $$-$$ 2! $$\times$$ 7!
B
9! $$-$$ 2! $$\times$$ 8!
C
9! $$-$$ 8!
D
9! $$-$$ 7!
3
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

If a person has 3 coins of different denominations, the number of different sums can be formed is

A
3
B
7
C
8
D
3!
4
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

There are 7 identical white balls and 3 identical black balls. The number of distinguishable arrangements in a row of all the balls, so that no two black balls are adjacent is

A
120
B
89 . (8!)
C
56
D
42 $$\times$$ 54
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