1 votes
1
Following marks are obtained by the students in a test:$81,72,90,90,86,85,92,70,71,83,89,95,85,79,62$. Range of the marks is$9$$17$$27$$33$
5 votes
3
Without stops, a train travels an average of $50$ $km$ an hour. With stops, it travels $40$ $km$ an hour. For how many minutes, on average, does the train stop in an hour...
0 votes
5
If $pqr \ne 0$ and $p^{-x}=\dfrac{1}{q},q^{-y}=\dfrac{1}{r},r^{-z}=\dfrac{1}{p},$ what is the value of the product $xyz$ ?$-1$$\dfrac{1}{pqr}$$1$$pqr$