1
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The raw data $$x_1, x_2, \ldots \ldots, x_{\mathrm{n}}$$ is an A.P. with common difference $$\mathrm{d}$$ and first term $$0, \bar{x}$$ and $$\sigma^2$$ are mean and variance of $$x_{\mathrm{i}}, \mathrm{i}=1,2, \ldots \ldots \mathrm{n}$$, then $$\sigma^2$$ is

A
$$\frac{\left(n^2+1\right) d^2}{24}$$
B
$$\frac{\left(\mathrm{n}^2-1\right) \mathrm{d}^2}{24}$$
C
$$\frac{\left(\mathrm{n}^2+1\right) \mathrm{d}^2}{12}$$
D
$$\frac{\left(\mathrm{n}^2-1\right) \mathrm{d}^2}{12}$$
2
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The particular solution of differential equation $$\mathrm{e}^{\frac{d y}{d x}}=(x+1), y(0)=3$$ is

A
$$y=x \log x-x+2$$
B
$$y=(x+1) \log (x+1)-x+3$$
C
$$y=(x+1) \log (x+1)+x-3$$
D
$$y=x \log x+x-2$$
3
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

A card is drawn at random from a well shuffled pack of 52 cards. The probability that it is black card or face card is

A
$$\frac{3}{13}$$
B
$$\frac{5}{13}$$
C
$$\frac{6}{13}$$
D
$$\frac{8}{13}$$
4
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

If $$\bar{a}=2 \hat{i}+3 \hat{j}-4 \hat{k}$$ and $$\bar{b}=\hat{i}-\hat{j}-\hat{k}$$, then the projection of $$\bar{b}$$ in the direction of $$\bar{a}$$ is

A
$$\frac{1}{\sqrt{29}}$$
B
$$\frac{2}{\sqrt{3}}$$
C
$$\frac{5}{\sqrt{3}}$$
D
$$\frac{3}{\sqrt{29}}$$
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