Solve the following problems:

If one can have 4 pens instead of 2 balls. How many pens can one have instead of 10 balls?

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Solution

Let x be the number of pens one can have instead of 10 balls.

The quantities involved in the situation are in direct proportion.

∴ 4 : 2 = x : 10

Thus, one can have 20 pens instead of 10 balls.

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Solve the following problems: If one can have 4 pens instead of 2 balls. How many pens can one have instead of 10 balls?

Let x be the number of pens one can have instead of 10 balls. The quantities involved in the situation are in direct proportion. ∴ 4 : 2 = x : 10 Thus, one can have 20 pens instead of 10 balls.

Solve the following problems:

If one can have 4 pens instead of 2 balls. How many pens can one have instead of 10 balls?

Let x be the number of pens one can have instead of 10 balls.

The quantities involved in the situation are in direct proportion.

∴ 4 : 2 = x : 10

Thus, one can have 20 pens instead of 10 balls.