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There are 7 people he wishes to invite. Every friend has 2 choices either accept or decline the invitation. So, total ways = 2*2*2*2*2*2*2 =27 Now, we know 1 or more may accept the invitation(given). So, no person is coming to part = 1 way. So, required ways = 27 – 1 = 128 – 1 = 127
56 x 8 – 65% of 40 = ? + 14 x √625
382+ 482+ 572= ? - (81x 49)
464 + 181 +? = (154 × 25) - (15) 2
50% of (22 x 15) + 205 = ?
√11025 x √5625 - (50)² = (?) + (73)²
(122 - 82 ) X ? = 90% of 500 - (90 - 25) X 2
4567.89 - 567.89 - 678.89 = ?