PSLE The bar graph shows the number of visitors to a safari park 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 85 less than the average number of visitors from Monday to Friday. If the number of visitors on Saturday was 640, how many visitors were there on Sunday?
(a)
Total number of visitors from Monday to Friday last week
= 240 + 800 + 480 + 680 + 700
= 2900
Average number of visitors from Monday to Friday last week
= 2900 ÷ 5
= 580
(b)
Average number of visitors on Saturday and Sunday
= 580 - 85
= 495
Total number of visitors on Saturday and Sunday
= 2 x 495
= 990
Number of visitors on Sunday
= 990 - 640
= 350
Answer(s): (a) 580; (b) 350