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
If a2 + b2 = 16 and 2ab = 7.Find all the possible values of (a - b)...
In the diagram, O is a circle centre of the circle PQRS and < PSR = 86o. If < PQR = xo, find x...
In the diagram, |QR| = 10m, |SR| = 8m < QPS = 30o, < QRP = 90o and |PS| = x, Find x...
If 3x−14)12>14−x, then the interval of values of x ...
Find the sum of the first 18 terms of the series 3, 6, 9,..., 36. ...
The diagram is a circle with centre P. PRST are points on the circle. Find the value of < PRS ...
The diagram is a circle centre O. If < SPR = 2m and < SQR = n, express m in terms of n ...
Express 0.000834 in standard form ...
A school girl spends 14 of her pocket money on books and 13 on dress....