The table shows the heights of Lucy, Sophia, and Ellie. The average height of three children is 157 cm. The digit in the ones place of Lucy's height and the digit in the tens place of Ellie's height are covered by ink blots.
- What is the digit in the ones place of Lucy's height?
- What is the digit in the tens place of Ellie's height?
Total height of the three children
= 3 x 157
= 471 cm
Total height of Lucy and Sophia
= 471 - 132
= 339
339 - 160 - 103
= 76
= 7 tens 6 ones
(a) Digit in the ones place of Lucy's height = 6
(b) Digit in the tens place of Ellie's height = 7
Answer(s): (a) 6; (b) 7