JEE Mains 30-Jan-2023 Shift 1 Solved Paper
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Question : 86 of 90
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The mean and variance of 7 observations are 8 and 16 respectively. If one observation 14 is omitted a and b are respectively mean and variance of remaining 6 observation, then a + 3 b − 5 is equal to _______.
[30-Jan-2023 Shift 1]
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