\begin{aligned}
=> x+3 = 24 => x = 21
\end{aligned}
So largest number is 21 + 6 = 27
2. The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is
45
50
55
60
Answer: Option A
3. The average of six numbers is X and the average of three of these is Y.If the average of the remaining three is z, then
x = y + z
2x = y + z
x = 2y + z
x = y + 2z
Answer: Option B
Explanation:
X =((3y+3z)/6)
or
2X= y + z
4. A batsman makes a score of 87 runs in the 17th match and thus increases his average by 3. Find his average after 17th match
36
37
38
39
Answer: Option D
Explanation:
Let the average after 17th match is x
then the average before 17th match is x-3
so 16(x-3) + 87 = 17x
=> x = 87 - 48 = 39
5. A motorist travel to a place 150 km away at an avearge speed of 50 km/hr and returns ar 30 km/hr.His average speed for the whole jouney in km/hr is