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Let S be the sample space. Then, n(S) = 52C2 = (52 x 51)/(2 x 1) = 1326 Let E = event of getting 1 ace and 1 queen. n(E) = number of ways of choosing 1 ace out of 4 and 1 queen out of 4 = 4C1x 4C1 = 4 x 4 = 16 Therefore, P (E) = (n(E))/(n(S)) = 16/1326 = 8/663
The ratio of downstream speed to upstream speed of a boat is 5:3. If the boat can cover 160 km in still water in 10 hours, then find the difference betw...
The speed of the stream is 12 km/h, and the speed of the boat in still water is 50% greater than the speed of the stream. Calcula...
A, B and C started a business by investing in the ratio 1/5 : 1/4 : 2/6. After 6 months C withdrew 1/4 of his investment. If after 1 year from start of ...
The ratio of speed of the boat and the speed of the current is 6:5. If the downstream speed of the boat is 44 km/hr. Then find how much distance will th...
Speed of boat is 20 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 72 km downstream?
A boatman covers 192 km upstream in 4 hours and 288 km downstream in 4 hours. Find the time taken by the boatman to cover 240 km in still water.
A man can row 12 km/hr in still water. If the speed of the current is 3 km/hr, it takes 4 hours more in upstream than in the downstream for the same dis...
A boat can travel 21 km downstream in 42 min. The ratio of the speed of the boat in still water to the speed of the stream is 5: 1. How much time will t...
The ratio of the speed of boats ‘A’ and ‘B’ in still water is 8:9, respectively. The speed of the current is 25% of the speed of boat ‘A’ in...
