A point is selected at random from the interior of a circle. The probability that the selected point is closer to the centre then the boundary of the circle is |
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(a) |
(b) |
(c) |
(d) |

A point is selected at random from the interior of a circle. The probability that the selected point is closer to the centre then the boundary of the circle is |
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(a) |
(b) |
(c) |
(d) |

The mean of 100 observations is 24. If 4 is added to each of the observations and then each of them is multiplied by 2.5 then new mean is |
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(a) |
70 |
(b) |
80 |
(c) |
65 |
(d) |
75 |

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