Sbi Clerk Pre Exam Template With Answers Page 21
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35SBI Clerk Pre – Model Paper – 3 (Based on real exam)
Where E denotes the position of an English book and X that of a Hindi book.
Since there are 21 books on English, the number of places marked X are
therefore, 22
Now, 19 places out of 22 can be chosen in
C
=
C
=
= 1540
22
22
19
3
ways
Hence, the required number of ways = 1540
17.
Option B
Out of 30 numbers 2 numbers can be chosen in
C
ways.
30
2
So, exhaustive number of cases =
C
= 435
30
2
Since
⎯
is divisible by 3 if either a and b are divisible by 3 or none of a and b
is divisible by 3. Thus, the favourable numbers, of cases =
C
+
C
= 235
10
20
2
2
Hence, required probability =
=
18.
Option C
Required probability =
×
=
19. Option D
Here, S = {1, 2, 3, 4, ...., 19, 20}.
Let E = event of getting a multiple of 3 or 5 = {3, 6 , 9, 12, 15, 18, 5, 10, 20}.
P (E) =
=
20. Option A
Total number of balls = (2 + 3 + 2) = 7
Let S be the sample space.
Then, n(S) = Number of ways of drawing 2 balls out of 7
=
C
7
2
=
= 21
Page 21
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