A box contains 6 blue shirts, 7 yellow shirts and 9 pink shirts. In how many ways can 4 shirts be drawn from the box, if at least one blue shirt, one yellow shirt and one pink shirt is to be included in a draw?
Required number of ways = (6C2 ) × 7C1 × 9C1 => (15 × 7 × 9) + (6 × 21 × 9) + (6 × 7 × 36) => 945 + 1134 + 1512 = 3591
2280.03 ÷ 59.98 x 59.9 = ? + 30.32
? = 44.78% of 839.91 – 48.12% of 774.89 + 55.77% of 1024.85
(?)2 + 9.113 = 31.92 – 39.03
(16.16 × 34.98) + 14.15% of 549.99 = ? + 124.34
287.97 ÷ √323.99 = ? + 4.05-2 × 64.05
75.22 of 219.98% + 359.99 ÷ 18.18 = ?
(?)2 + 8.113 = 28.92 – 73.03
14.2% of 7200 + 2.8% of 6400 =?
20.11% of 179.99 + √120.97 ÷ 11.02 = ?
25.19% of (?2 ÷ 38.87 × 4679.94) = 6299.82 ÷ 419.78 × 50.15
