Frequency distribution of age of a person (in years) attending trekking camp is given below:
(Age in years) $15 - 19$ $20 - 24$ $25 - 29$ $30 - 34$ $35 - 39$ $40 - 44$
No. of persons $10$ $60$ $50$ $30$ $5$ $5$
How many persons are there of age $35$ and above?

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Solution

(Age in years) $15 - 19$ $20 - 24$ $25 - 29$ $30 - 34$ $35 - 39$ $40 - 44$
No. of persons $10$ $60$ $50$ $30$ $5$ $5$
The persons of age $35$ and above are $(5 + 5) = 10$ .

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20 - 24

Age (years)	15−19	20−24	25−29	30−34	35−39	40−44
No. of Persons	4	20	38	24	10	4

Age group(years)	$20 - 25$	$25 - 30$	$30 - 35$	$35 - 40$
No. of persons	$60$	$80$	$35$	$25$

Age (in years)	Frequency	Age (in years)	Frequency
15−19 20−24 25−29 30−34 35−39	53 140 98 32 12	40−44 45−49 50−54 55−59 60 and above	9 5 3 3 2

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(Age in years)	$15 - 19$	$20 - 24$	$25 - 29$	$30 - 34$	$35 - 39$	$40 - 44$
No. of persons	$10$	$60$	$50$	$30$	$5$	$5$