Out of the ratios $7 : 15, 15 : 23, 17 : 25$ and $21 : 29$ . The smallest ratio is

7 : 15

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17 : 25

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21 : 29

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15 : 23

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Solution

The correct option is C $7 : 15$
Since, $7 : 15 = \frac{7}{15} = 0.47$

$15 : 23 = \frac{15}{23} = 0.65$

$17 : 25 = \frac{17}{25} = 0.68$ and

$21 : 29 = \frac{21}{29} = 0.72$

$∴$ $7 : 15$ is the smallest ratio.

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15, 25, 14, 21, 9, 21, 25, 27, 29, 6, 14, 21, 21, 27, 25, 27, 9, 15, 14, 9

Given below are marks obtained by $20$ students in Math out of $25$ .

$21, 23, 19, 17, 12, 15, 15, 17, 17, 19, 23, 23, 21, 23, 25, 25, 21, 19, 19, 19$

Prepare a frequency distribution table for the given data.

18

f

15

25, 19, 17, 24, 23, 29, 31, 40, 19, 20, 22, 26, 17, 35, 21

$x$	$19$	$21$	$23$	$25$	$27$	$29$	$31$
$f$	$13$	$15$	$16$	$18$	$16$	$15$	$13$

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