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Aptitude Day 334

Answers of Day 333: 1. 700.
                                     2. z = 2x.

Problems on Percentage:

1. From the salary of an officer, 20% is deducted as house rent, 10% of the rest, he spends on conveyance, 30% of the rest he pays as income tax and 20% of the balance, he spends on clothes. Then, he’s left with 8024. Find his total salary.

Solution:
                  80/100 * 90/100 * 70/100 * 80/100 * x = 8024.

                  x = 20,000.

2. In an examination, 50/5 of the students failed in mathematics and 60% failed in English. If 30% of the students failed in both the subjects, then the percentage of students who passed in both the subjects was:

Solution:
                    n(AUB) = n(A)+n(B)-n(A∩B)
                                  = 50+ 60-30
                                  = 80.

                    Percentage passed = 100-80
                                                  = 20%.



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Answers of Day 331: 1. 450%.                                     2. 10.   Problems on Percentage: 1. 0.001 is what percent of 0.01? Solution:                   0.001/0.01 * 100 = 1/10* 100                                               = 10%. 2. A fruit seller had some apples. He sells 20% apples and still has 500 apples. Originally, he had: Solution:                (100-20)% of x = 500                80/100*x = 500                x = 625.
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