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Level 1
The average cost of a duck and 6 turkeys is $10.20. The average cost of each turkey is $9.90. How much does the duck cost?
2 m
Level 1
A family's average monthly spending for August and September was $713. Their average monthly spending from October to December was $824. What was their total spending from August to December?
2 m
Level 1
The average of two numbers is 124 and the average of another set of two numbers is 262. Find the average of these four numbers.
2 m
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Level 2
A group of 50 girls and 20 boys took part in a Mathematics test. The average score of the girls was 50 points. While the average score of the boys was 64 points. What was the average score of all the students who participated in the test?
2 m
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Level 2
The average height of 3 children was 1.32 m. One of the children, whose height was 1.3 m, left the group. What was the average height of the remaining children?
2 m