A final examination requires that a student answer any 4 ...
A final examination requires that a student answer any 4 out of 6 questions. In how many ways can this be done?
15
20
30
45
Correct answer is A
The question will be answered in
5C4=6!(6−4)!4!=6!2!4!=6×5×4!2×1×4!=15ways
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In the figure, If PT is parallel to RS, PQ = PT, and angle SQT = 90o, Find x...
Evaluate 1 − (15 x 123) + (5 + 123)...
The gradient of the straight line joining the points P(5, -7) and Q(-2, -3) is ...
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In the diagram, O is the center of the circle QRS and ∠SQR = 28°. Find ∠ORS. ...