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Averages
The average temperature of all 7 days of the week is 30, that of the first 3 days is 28 and of the next 3 days is 31. What is the temperature on the last day of the week?
A. 31
B. 30
C. 28
D. 33
E. 29
Read Solution (Total 6)
-
- Total 7 days average is 30 so Total Temperature is 7*30=210
First 3 days average is 28 So First 3 days Temperature is 3*28=84
Like Next 3 days is 3*31=93
Last day Temperature is =Total temperature-(First 3 days+Next 3 Days)
Last days is=210-(84+93) i.e 33 - 9 years agoHelpfull: Yes(1) No(0)
- last day=x, (28+31+x)/3=30, solving x=31
- 12 years agoHelpfull: Yes(0) No(2)
- Let the no. of days be a,b,c,d,e,f,g
a+b+c+d+e+f+g/7=30
a+b+c/3=28
d+e+f/3=31
now from above a+b+c=84
and d+e+f=93
therefore g=210-84-93
g=33
so ans is 33 - 10 years agoHelpfull: Yes(0) No(0)
- for 7 day=7*30=210
for first three days=3*28=84
for next three days=31*3=93
total 6 days=84+93=177
i.e, for last day temp=210-177=33
ans - 8 years agoHelpfull: Yes(0) No(0)
- In given question we have temperature of hole week i.e 7 * 30,as well as we have remaining days of information.we need to find out the temperature of the last Day.let assume it as LD
7 * 30 = 3 * 28 + 3 * 31 + LD(Last Day)
LD = 7*30 - 3 1* 28 - 3 * 31
= 210 - 84 - 93
= 33. - 6 years agoHelpfull: Yes(0) No(0)
- We have 7 days in a week.
- 6 years agoHelpfull: Yes(0) No(0)
Wipro Other Question
The average age of a husband, his wife and son 3 years ago was 27 years and that of his wife and son 5 years ago was 20 years. What is the husband’s present age?
A. 35 years
B. 37 years
C. 32 years
D. 40 years
E. 38 years
The average age of A and B is 20 years. If C replace A the average would be 19 and if C replaces B the average would be 21. What are the ages of A, B and C?
A. 22, 20, 18
B. 22, 18, 20
C. 18, 20, 22
D. 18, 22, 20
E. 22, 19, 20