PSLE The bar graph shows the number of visitors to a zoo 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 128 more than the average number of visitors from Monday to Friday. If the number of visitors on Saturday was 780, how many visitors were there on Sunday?
(a)
Total number of visitors from Monday to Friday last week
= 600 + 680 + 480 + 420 + 260
= 2440
Average number of visitors from Monday to Friday last week
= 2440 ÷ 5
= 488
(b)
Average number of visitors on Saturday and Sunday
= 488 + 128
= 616
Total number of visitors on Saturday and Sunday
= 2 x 616
= 1232
Number of visitors on Sunday
= 1232 - 780
= 452
Answer(s): (a) 488; (b) 452