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Q1.

$A$ motorist covered the first $20 \text{ km}$ of his journey in $30 \text{ minutes}$ and the remaining $29 \text{ km}$ in $40 \text{ minutes}$. His average speed in $\text{km/hr}$ is:

(A)

$41 \frac{3}{4}$

(B)

$42$

(C)

$49$

(D)

$57 \frac{1}{6}$

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Q2.

The mean of $19$ observations is $4$. If one more observation of $24$ is added to the data,the new mean will be

(A)

$4$

(B)

$5$

(C)

$6$

(D)

$7$

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