m4maths Maths Puzzle

There are 52 cards in a pack. We have to select 4 cards of different suits without replacement. What will be its probability

Read Solution (Total 5)

(13/52 * 13/51 * 13/50 * 13/49)
12 years agoHelpfull: Yes(11) No(2)

= 13c1*13c1*13c1*13c1 / 52c4
12 years agoHelpfull: Yes(9) No(4)
52c1/52c1*39c1/52c1*26c1/52c1*13c1/52c1
12 years agoHelpfull: Yes(1) No(3)
Probability is here 1*39/42*26/52*13/52
= 1*1/2*3/4*1/4 = 3/32
12 years agoHelpfull: Yes(0) No(2)
1/13
since 4/52=1/13
12 years agoHelpfull: Yes(0) No(1)

m4maths Other Question

A positive number is equal to the sum of all numbers after it in a geometrical progression. Common difference of GP will be in a river bed,there lay some stones placed at intervals of 10 metres. these stones have to be arranged in order for transportation ,around a pole ,one at a time. one person was given this task of arranging the stones .If he travelled a total distance of 4.8 km, find the total number of stones on the river bed.

a) 15 b) 20 c) 19 d) 33