>> Raj tossed 3 dices and there results are noted down then what is the probability that raj gets 10?
A) 1/72
B) 1/9
C) 25/216
D)1/8
27/216 than ans is 1/8
>>
From 52 cards 3 cards drawn randomly prob of getting 1 spade , 1 red queen and 1 black king??
13C1*2C1*2C1/52C3 = 0.00235
A) in how many ways can 3 postcards can be posted in 5 postboxes?
B) in how many ways can 5 postboxes hold 3 post cards?
A)5^3
B)3^5
The climb from foot to top of a hill 800 meters, Jack can climb at
16 meters per minute and rests for two minutes or 20meters per 2 minutes
and rest for one minute. Paul can climb at 10 meters per one minute and
rest for one minute or16 meters per minute and rest for 2 minutes. If
take has to reach the top in exactly two hours. What is the maximum
number of rests that he can take?
A) 41 b) 42 c) 40 d) 43
Total=800m
16m per min means for 1m=800/16 =50min to climb
10m per min means for 1m=800/10=80min to climb for paul.....The total
time is 2hours==120min....so, time taken for rest by paul is
120-80=40min
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