What is the probability of getting correctly at least 6 of the 10 answers in a TRUE-FALSE objective
test? (Binomial Distribution)
Answers
Answered by
1
Answer:
probability of getting currently at least 2 by 5
Answered by
8
Step-by-step explanation:
When each question can have two possible answers, we can have the two choices for one question.
Thus, for 10 true false questions, we have to choose 6 as correct and remaining will be incorrect automatically.
n
C
r
=
10
!
6
!
(
10
−
6
)
!
=
10
×
9
×
8
×
7
4
×
3
×
2
=
210
different ways in which we can get the correct answer.
The probability will be
=
F
a
v
o
u
r
a
b
l
e
O
u
t
c
o
m
e
T
o
t
a
l
O
u
t
c
o
m
e
s
=
210
2
10
=
210
1024
=
20.50
%
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