In how many ways can at least two team members be selected for grade A out of 7 members in a group?
(b) 7C2 +7 C3 +7 C4 + 7C5 +7 C6 + 7C7
(c)7P2 +7 P3 + 7P4 +7 P5 + 7P6 + 7P7
(d) 7C0 +7C1
How many numbers lie between 300 and 500 in which 4 comes only one time? [UPSC 2009(CS-P)]
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It is impossible to be a mathematician without being a poet in soul.Sofia Kovalevskaya
Everything in nature adheres to the cone, the cylinder and the cube.Paul Cezanne
Placed in Infosys With Help for M4Maths
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I got successfully placed in TCS pool drive. Thank you M4 MathsNaveen Kumar 3 years ago