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
Yuki has taken 3 tests. The scores of the first 2 are 79, 87. The mean of all 3 is 81. What did Yuki score on the last test?
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Question 2
The mean of 6 numbers is 14. A new number, 24, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 3
Aisha has taken 5 tests. The scores of the first 4 are 61, 63, 66, 60. The mean of all 5 is 65. What did Aisha score on the last test?
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Question 4
The mean of 5 numbers is 15. A new number, 19, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 5
Kwame has taken 4 tests. The scores of the first 3 are 80, 76, 90. The mean of all 4 is 80. What did Kwame score on the last test?
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Question 6
The mean of 8 numbers is 8. A new number, 24, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 7
Maya has taken 3 tests. The scores of the first 2 are 83, 74. The mean of all 3 is 74. What did Maya score on the last test?
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Question 8
The mean of 6 numbers is 18. A new number, 19, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 9
Ana has taken 4 tests. The scores of the first 3 are 63, 57, 68. The mean of all 4 is 67. What did Ana score on the last test?
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Question 10
The mean of 7 numbers is 12. A new number, 3, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 11
Ravi has taken 4 tests. The scores of the first 3 are 77, 78, 69. The mean of all 4 is 75. What did Ravi score on the last test?
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Question 12
The mean of 7 numbers is 13. A new number, 15, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 13
Priya has taken 5 tests. The scores of the first 4 are 87, 82, 75, 89. The mean of all 5 is 80. What did Priya score on the last test?
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Question 14
The mean of 7 numbers is 12. A new number, 3, is added. What is the new mean? Round to 1 decimal place if needed.
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Question 15
Zara has taken 3 tests. The scores of the first 2 are 77, 81. The mean of all 3 is 85. What did Zara score on the last test?
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Question 16
The mean of 5 numbers is 15. A new number, 11, is added. What is the new mean? Round to 1 decimal place if needed.
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