By travelling at 10km/h higher than the original speed, train is able to make up 18 minutes while travelling 60 km. This condition is only satisfied at an initial speed of 40(and a new speed of 50 km/h). Alternate method: We go by option: 60/40 - 60/(40+10) = 3/2 - 6/5 = 3/10 3/10 x 60 = 18 minutes
The fair dice is rolled 15 times and face value are noted
Face Value:Â Â Â Â Â Â Â Â 1Â Â Â Â Â Â Â Â Â Â Â Â Â 2Â Â Â Â Â Â Â Â Â Â Â Â Â 3...
If a discrete random variable X follows uniform distribution and assumes only the values 8, 9, 11, 15, 18, 20, the value of P(|X-14| < 5) will be:
If mean and median of the distribution are 12 and 21, then the distribution
For a distribution, the mean is 10, variance is 16, Y1 is +1 and β2 is 4. The distribution is:
The average working hours per month of the staff aged over 50 years in a factory were 160 and that of the staff aged under 50 years were 210. The mean ...
Which option is WRONG?
If the occurrence of events follows Poisson Process with mean rate λ, then inter-occurrence time of events will follow:
The value of k so that following is probability mass function
X:Â Â Â Â Â Â Â Â Â Â Â -2Â Â Â Â Â Â Â Â Â Â Â -1Â Â Â Â Â Â Â Â Â Â Â 0Â Â Â...
Two random variables X and Y are said to be independent if:
