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A toy can produce 10diiff sounds. Nw toy is defective to produce 2 sounds in 3min. find probability that it produces 6 consecutive is 1 in(_)

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if a tank a can be filled within 10 hrs and tank B is 1/4th filled in 19 hrs.. then wat is the duration of the tank to fill completely? 4 years ago ,Athena's age was twice Helen's age.4 years hence,Athena's age will be 4/3 times the age of Helen.Find Athena's present age in binary numbers during the time that the statement holds true.
a)100
b)1001
c)101
d)1100