1
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
2
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

The number of ways of distributing eight identical rings to three different girls so that every girl gets at least one ring is

A
21
B
120
C
8P3
D
8P3 $$-$$ 6
3
AP EAPCET 2021 - 19th August Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the letters of the word REGULATIONS be arranged in such a way that relative positions of the letters of the word GULATIONS remain the same, then the probability that there are exactly 4 letters between R and E is

A
$$\frac{3}{55}$$
B
$$\frac{6}{55}$$
C
$$\frac{9}{55}$$
D
$$\frac{7}{55}$$
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