Five mark example problems II — task. Mathematics State Board, Class 9.

PDF chapter test TRY NOW

1. The following data gives the number of residents in an area based on their age. Find the average age of the residents. (using direct method)

Age	$0 - 10$	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$
Number of residents	$2$	$6$	$9$	$7$	$4$	$2$

Answer:

The average age

$=$

2. Find the mean for the following frequency table: (using assumed mean method)

Class Interval	$100 - 120$	$120 - 140$	$140 - 160$	$160 - 180$	$180 - 200$	$200 - 220$	$220 - 240$
Frequency	$10$	$8$	$4$	$4$	$3$	$1$	$2$

Answer:

The mean

$=$

(Note: Round off the answer to

$3$ decimal places.)

Did you find an error?

9. Five mark example problems II