Question : The average weight of Group A and Group B is 12 kg and 24 kg, respectively. The ratio of the members in group A to group B is 1 : 2. Find the combined average of both groups.
Option 1: 16 kg
Option 2: 22 kg
Option 3: 20 kg
Option 4: 18 kg
New: SSC CHSL Tier 2 answer key released | SSC CHSL 2024 Notification PDF
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 20 kg
Solution : Let the members in group A and group B be $x$ and 2$x$ respectively. So, weighted average = $\frac{\text{Sum of weights of each group}}{\text{Total number of members}}$ = $\frac{12 \times x+24 \times 2x}{x+2x} = \frac{12 + 48}{3} = 20$ Hence, the correct answer is 20 kg.
Candidates can download this e-book to give a boost to thier preparation.
Result | Eligibility | Application | Admit Card | Answer Key | Preparation Tips | Cutoff
Question : The average weight of 64 students is 48 kg and the average weight of another class of 32 students is 24 kg. Find the average weight of both classes combined.
Question : The average weight of a class of 30 students is 45 kg. One of the students whose weight is 48.5 kg was replaced by another student and the average weight was increased by 200 g. Find the weight of the new student.
Question : The ratio of the number of men to the number of women in an office is 2 : 3. If the average weight of the men and the women in the office are 56 kg and 51 kg, respectively, find the average weight of the employees in the office (in kg).
Question : The average age of A and B is 20 years. If A is to be replaced by C, the average would be 19 years. The average age of C and A is 21 years. The ages of A, B, and C in order (in years) are:
Question : The average weight of R, P, and K is 40 kg. If the average weight of P and K is 45 kg and the average weight of R and K is 35 kg, then what is the weight of K?
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile