Practice questions

# Practice questions - = 395 Q 3 The average of 5 quantities...

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Q 0: Find the combined mean of these two data sets. Q 1 : If the mean of the following data is 3.4, then find the missing value of frequency. Valu e Frequency 1 3 2 5 3 2 4 f 5 3 6 3 Answer: 4 Q 2: If the mean of numbers 28, x, 42, 78 and 104 is 62, then what is the mean of 128, 255, 511, 1023 and x? Explanatory Answer The average (arithmetic mean) of the 5 numbers 28, x, 42, 78 and 104 is 62. Therefore, the sum of these 5 numbers is 62 * 5 = 310 i.e., 28 + x + 42 + 78 + 104 = 310 Hence, x = 310 - 252 = 58. The average of 128, 255, 511, 1023 and x =

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Unformatted text preview: = 395 Q 3: The average of 5 quantities is 6. The average of 3 of them is 8. What is the average of the remaining two numbers? Explanatory Answer The average of 5 quantities is 6. Therefore, the sum of the 5 quantities is 5 * 6 = 30. The average of three of these 5 quantities is 8. Therefore, the sum of these three quantities = 3 * 8 = 24 The sum of the remaining two quantities = 30 - 24 = 6. Average of these two quantities = = 3....
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## This note was uploaded on 05/21/2011 for the course MARKETING 104 taught by Professor Fazli during the Spring '11 term at College of E&ME, NUST.

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Practice questions - = 395 Q 3 The average of 5 quantities...

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