PSLE The bar graph shows the number of visitors to a museum from Monday to Friday last week.
- What was the average number of visitors from Monday to Friday last week?
- The average number of visitors on Saturday and Sunday was 30 less than the average number of visitors from Monday to Friday. If the number of visitors on Saturday was 420, how many visitors were there on Sunday?
(a)
Total number of visitors from Monday to Friday last week
= 440 + 560 + 800 + 280 + 320
= 2400
Average number of visitors from Monday to Friday last week
= 2400 ÷ 5
= 480
(b)
Average number of visitors on Saturday and Sunday
= 480 - 30
= 450
Total number of visitors on Saturday and Sunday
= 2 x 450
= 900
Number of visitors on Sunday
= 900 - 420
= 480
Answer(s): (a) 480; (b) 480