1
MHT CET 2021 21th September Evening Shift
+2
-0

The mean of five observations is 4 and their variance is 5.2. If three of these observations are 1, 2 and 6, then the other two are

A
2 and 9
B
3 and 8
C
4 and 7
D
5 and 6
2
MHT CET 2021 21th September Evening Shift
+2
-0

For X ~ B(n, p), if p = 0.6, E(X) = 6, then Var(X) =

A
6.6
B
24
C
2.4
D
6
3
MHT CET 2021 21th September Evening Shift
+2
-0

A bakerman sells 5 types of cakes. Profit due to sale of each type of cake is respectively ₹ 2.5, ₹ 3 , ₹ 1.5 and ₹ 1. The demands for these cakes are $$20 \%, 5 \%, 10 \%, 50 \%$$ and respectively, then the expected profit per cake is

A
₹ 1.725
B
₹ 0.01725
C
₹ 0.1725
D
₹ 17.25
4
MHT CET 2021 21th September Morning Shift
+2
-0

For two data sets each of size 5 , the variance are given to be 4 and 5 and the corresponding means are given to be 2 and 4 respectively. The variance of the combined data set is

A
$$\frac{13}{2}$$
B
$$\frac{5}{2}$$
C
$$\frac{11}{2}$$
D
$$\frac{15}{2}$$
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