25, 35, 20, 45,?

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None of these

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Solution

The correct option is C 10
$25 + 5 \times 2 = 35 35 - 5 \times 3 = 20 20 + 5 \times 5 = 45 45 - 5 \times 7 = 10$

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Age	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$	$40 - 45$	$45 - 50$
Number of persons	$170$	$110$	$80$	$45$	$40$	$35$

Size of item	$10 - 15$	$15 - 20$	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$	$40 - 45$	$45 - 50$
No. of items	$4$	$8$	$18$	$30$	$20$	$10$	$5$	$2$

\frac{4^{5} + 4^{5} + 4^{5} + 4^{5}}{2^{5} + 2^{5}} \times \frac{6^{5} + 6^{5} + 6^{5} + 6^{5} + 6^{5} + 6^{5}}{3^{5} + 3^{5} + 3^{5}} = 8^{n}

From the following data identify the median class $:$

Time(hour)	$5 - 15$	$15 - 25$	$25 - 35$	$35 - 45$	$45 - 55$	$55 - 65$
Frequency	$20$	$28$	$17$	$12$	$6$	$17$

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