Problems with the mean
6th grade (Year 7 in England) · 16 questions · Common Core: 6.SP.B.5.C · England: KS3 Statistics, GCSE Foundation Statistics, 11+ Statistics
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Question 1
The mean of 8 numbers is 17. A new number, 10, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 2
Isla has taken 5 tests. The scores of the first 4 are 96, 79, 97, 96. The mean of all 5 is 87. What did Isla score on the last test?
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Question 3
The mean of 5 numbers is 10. A new number, 8, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 4
Kai has taken 5 tests. The scores of the first 4 are 58, 75, 62, 62. The mean of all 5 is 65. What did Kai score on the last test?
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Question 5
The mean of 7 numbers is 18. A new number, 17, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 6
Daniel has taken 6 tests. The scores of the first 5 are 93, 95, 77, 96, 85. The mean of all 6 is 87. What did Daniel score on the last test?
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Question 7
The mean of 6 numbers is 9. A new number, 4, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 8
Hiro has taken 6 tests. The scores of the first 5 are 83, 80, 77, 88, 87. The mean of all 6 is 78. What did Hiro score on the last test?
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Question 9
The mean of 7 numbers is 13. A new number, 7, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 10
Isla has taken 5 tests. The scores of the first 4 are 72, 61, 72, 74. The mean of all 5 is 64. What did Isla score on the last test?
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Question 11
The mean of 6 numbers is 8. A new number, 14, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 12
Chloe has taken 5 tests. The scores of the first 4 are 73, 77, 85, 68. The mean of all 5 is 77. What did Chloe score on the last test?
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Question 13
The mean of 7 numbers is 15. A new number, 12, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 14
Ava has taken 3 tests. The scores of the first 2 are 83, 81. The mean of all 3 is 85. What did Ava score on the last test?
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Question 15
The mean of 8 numbers is 14. A new number, 9, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 16
Isla has taken 3 tests. The scores of the first 2 are 75, 76. The mean of all 3 is 79. What did Isla score on the last test?
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