# 11th Class Math MCQS Chapter 7

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The numerical evaluation of a chance that a particular event will occur is called
Sample space
Event
Outcome
Probability

Generally, permutation of n different objects taken r ? n at a time is denoted by.
(n+1)!/r!(n-r+1)!
n!/(n – r)!
n!/r!(n – r)!
(n-1)!/(n-r)!r!

The factorial notation was introduced by
Blaise pascal
Demorgan
Pierre De Fermat
Christian Kramp

How many signal ca be given by 5 flags of different colours, using 3 flags at a time?
60
70
50
40

(n+1)!/(n-1)! =_________
n + 1
n2+ n
n2(n+1)
None of these

What are the number of diagonals of a 6-sided figure?
-7
6
8
9

nCn is always equal to
n
n!
0
1

If 11pn = 11.10.9, what is the value of n?
-1
2
3
1

5 – person can be seated at a round table in
25 ways
None of these
24 ways
20 ways

If the probability of an event occur is P(E) then the probability of event dose not occur is
0
P(E) -1
1
1- P(E)

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