The cost of an apple is twice that of a banana and the cost of a banana is 25% less than that of a guava. If the cost of each type of fruit increases by 10%, then the percentage increases in cost of 4 bananas, 2 apples and 3 guavas is?Options10%16%18%12%

Let's solve this step by step:

1. Let's assume the cost of a guava is $1.00. Therefore, the cost of a banana, which is 25$0.75. The cost of an apple, which is twice the cost of a banana, would be $1.50.

2. If the cost of each type of fruit increases by 10%, the new cost of a guava would be $1.10, the new cost of a banana would be$0.825, and the new cost of an apple would be $1.65.

3. The total cost of 4 bananas, 2 apples, and 3 guavas before the price increase would be (4 * $0.75) + (2 *$1.50) + (3 * $1.00) =$3.00 + $3.00 +$3.00 = $9.00.

4. The total cost of 4 bananas, 2 apples, and 3 guavas after the price increase would be (4 * $0.825) + (2 *$1.65) + (3 * $1.10) =$3.30 + $3.30 +$3.30 = $9.90.

5. The percentage increase in cost would be (($9.90 -$9.00) / $9.00) * 100 = 10%.

So, the answer is 10%.