Sum of first 12 numbers = (12 x 25) = 300 Sum of last 5 numbers = (44 x 5) = 220 Sum of 11th and 12th number = (300 - 220) = 80 ATQ- 7x+3x =80 10x=80 X =8 So, 11 th number = 7x =7×8=56 12th number = 3x =3×8 = 24
The average age of a class of 20 girls is 16 years. If 4 new girls having average age of 10 years join the class, then the average age of the class beco...
In an examination, the average marks obtained by the students is 75. After correcting the quantitative mistakes, the average of 100 students is reduced ...
Average of 15 observations calculated by a student was 70 but when he again went through his observations he realised that he took value of three observ...
The average of the first 10 numbers is 'x+20', the average of the next 14 numbers is 'x', and the average of the remaining 16 numbers is 'x−30'. If th...
A car covers a distance of 60 km at a consistent speed. If the car's speed is increased by 8 km/h, it would take 2 hours less to travel the same distanc...
The average of 30 numbers is 1.2. The average of the first 20 of them is 1.1 and that of the next 9 is 1. Then the last number is:
Fifteen movie theatres average 600 customers per theatre per day. If six of the theatres close down but the total theatre attendance stays the same, the...
The average of first two numbers and last two numbers of a set of six numbers is 70 and 45 respectively. If the overall average of all six numbers is 65...
Average run scored by a batsman in first ‘x’ matches is 70. In next 12 matches he scored runs with an average of 90 so that his overa...
The average income of 'Pawan', 'Qureshi,' and 'Ranjan' is Rs. 'y', and their incomes are in the ratio of 5:3:4, respectively. 'Pa...
