Login / Signup

Question

Determine the value of a − b given that a + 3b = 18a and 3a + b = 30 .

A 8

B 6

C 4

D 3

Practice Next

More Average Questions

Average age of a class of 41 students is 17 years. Average age of the class is increased by 18 months if the age of the teacher is included. Find the age o...
Three numbers are given such that when the average of any two numbers is added to the third number, the resulting sums are 350, 330, and 310. Determine the...
In a batch of 45 students, the average programming speed in Python is 80 lines per hour, but after one student left and 8 new students joined, the average ...
Virat Kohli's strike rate after facing 'b' balls is 120. In the subsequent 15 balls, he scores an additional 39 runs, leading to an increase in his strike ...
In a cricket match the captain of one of a team scored 23 runs more than the average runs scored by the remaining 9 batsmen of that team who batted in the ...
The average cost price of 18 pens (having equal cost price) decreased by Rs.2, when one of the pen is replaced by a new pen having cost price of Rs.74. Fin...
In a family of 14, the men eat on average 65 kg of food and women eat on an average 40 kg of food. The men and women are equal in number. A woman joined th...
A batch of 28 students had their average science score recorded as 66. Later it was identified that 70 was wrongly recorded as 60, and 65 was noted instead...
The average score obtained by 26 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score was...
The average weight of 9 students in a seminar is 42 kg. If the weight of 4 facilitators is also included, then the new average weight of each person (facil...

Relevant for Exams:

Hey! Ask a query

ask-question

🎓

Think You're Ready for RBI Grade B?

RBI Grade B 2026 Phase 1 Memory Based Paper

200 Questions with Detailed Solutions
Section-wise Coverage (GA, English, Quant & Reasoning)

Download Now 100% Free PDF