Jojo multiplied 3 with a number and found an answer. His friend Jeenu ...
Jojo's multiplication: 3 x A
Jeenu's multiplication: 9 groups of a number = 9 x B
Juni said Jeenu has interchanged the number multiplied by Jojo.
Thus, A = 9 and B = 3. 9 x 3 = 27.
Therefore, the answer is option (d).
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Jojo multiplied 3 with a number and found an answer. His friend Jeenu ...
Jojo multiplied 3 with a number and found an answer. His friend Jeenu made 9 groups of a number and found that his answer is the same as Jojo's answer. Jeenu then shared it with his sister Juni, who told Jeenu that he has just interchanged the numbers multiplied by Jojo. We need to find the answer that both Jojo and Jeenu found.
Let's assume the number that Jojo multiplied by 3 is x.
Jojo's calculation: 3 * x = 3x
Jeenu's calculation: 9 * y = 9y
According to the given information, Jojo's answer is the same as Jeenu's answer. So we can write:
3x = 9y
Juni told Jeenu that he has just interchanged the numbers multiplied by Jojo. This means that y is actually x and x is actually y. So we can rewrite the equation as:
3y = 9x
To find the value of the answer that both Jojo and Jeenu found, we can solve this equation.
Divide both sides of the equation by 3:
(3y)/3 = (9x)/3
y = 3x
Now we have two equations:
3x = 9y (Equation 1)
y = 3x (Equation 2)
To find the common value of x and y, we can substitute Equation 2 into Equation 1:
3x = 9(3x)
3x = 27x
Subtract 3x from both sides:
3x - 3x = 27x - 3x
0 = 24x
Since the value of x is 0, the answer that both Jojo and Jeenu found is:
3 * 0 = 0
Therefore, the correct answer is option D) 27.