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Hint: Product of extremes is equal to the product of mean. Proportional numbers are represented as \[a:b::c:d\] , where \[a,d\] are the extremes and \[b,c\] are known as the mean. In this question four proportional numbers are given so first we will add a common unknown number to them and then we will use means and extremes property to find the unknown number. Complete step-by-step answer: Note: The numbers are proportional when the ratio of the LHS of the proportions is equal to the RHS of the proportion. To check if the numbers are in proportion we just find their ratio of both the sides.
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Hence, the correct answer is "13".
What must be added to each term of the ratio 3 is to 5 so that the new ratio becomes 5 is to 6?∴ 7 has to be added to each term of 3 ∶ 5 to make the ratio 5 ∶ 6.
What must be added to each term of the ratio 2 is to 3?X = 2. So the ratio of 2:3 when added 2 to each term is 2*2:3+2.
What must be added to each term of the ratio 2/5 so that it may equal to?Answer: The required number is 13 which is added to each term of ratio 2:5 so that it may become equal to 5:6.
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