Question

John has $10$ blue and red marbles in his bag. Among these $10$ marbles, the number of blue marbles is $b$ and the number of red marbles is $r$. Which of the following is the correct algebraic equation ?

• A. $b+r=10$
• B. $b-r=10$
• C. $b\times r=10$
• D. None of the above

Answer 1

The correct option is A $b+r=10$

Number of blue marbles $=b$
Number of red marbles $=r$
Total number of blue and red marbles $=10$
$\Rightarrow b+r=10$