1
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
If the mean of the data $7,8,9,7,8,7, \lambda$ and 8 is 8 , then variance of the data is equal to
A
2
B
$7 / 8$
C
$9 / 8$
D
1
2
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
When two dice are thrown the probability of getting the sum of the values on them as 10 or 11 is
A
$\frac{7}{36}$
B
$\frac{5}{36}$
C
$\frac{5}{18}$
D
$\frac{7}{18}$
3
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
It is given that in a random experiment events $A$ and $B$ are such that $P(A)=\frac{1}{4}, P(A / B)=\frac{1}{2}$ and $P(B / A)=\frac{2}{3}$, then $P(B)$ is equal to
A
$1 / 3$
B
$2 / 3$
C
$1 / 2$
D
$1 / 6$
4
AP EAPCET 2024 - 23th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The probability that $A$ speaks truth is $75 \%$ and the probability that $B$ speaks truth is $80 \%$. The probability that they contradict each other when asked to speak on a fact is

A
$\frac{3}{20}$
B
$\frac{4}{20}$
C
$\frac{7}{20}$
D
$\frac{5}{20}$
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