-The mean of 10 observations is 21. If each observation is multiplied by 4 and 5 is subtracted from each of them, then the mean will be
A) 79
B) 81
C) 84
D) 16
Correct Answer:
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Q14: -If a:b=2:5, then the value of (2a+3b):(7a+5b)
Q15: -If the sum and difference of two
Q16: -The L.C.M. of 2/3, ¾, 5/6 is
A)30
B)24
C)60
D)72
Q17: -Which of the following is smallest?
A)641/3
B)93/2
C)321/5
D)163/4
Q18: -The mean of ten observations is 23.
Q20: -In a statistical investigation of 1000 families
Q21: -Look at this series: 3,4,7,8,11,12, _ .
Q22: -Pointing to a person, Raju said. "His
Q23: -Pointing to a girl, Ramakant said, "She
Q24: -Balaji said, "This girl is the wife
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