Infosys Company Numerical Ability Probability

In a company 30% are supervisors and 40%

employees are male if 60% of supervisors are male.

What is the probability? That a randomly chosen

employee is a male or female?

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Infosys Other Question

4 horses are tethered at 4 corners of a square plot of side 63 meters so that they just cannot reach one another. the area left ungrazed is (a)675.5 (b)780.6 (c)785.8 (d)850.5
The value of ¾ + 5 / 36 + 7 / 144 + …….+17 / 5184 + 19 / 8100 is??