A number is chosen at random among the first 120 natural numbers. The probability of the number chosen being a multiple of 5 or 15 is
A single letter is selected at random from the word 'probability'. The probability that it is a vowel is
A coin is tossed three times in succession, the number of sample points in sample space is
The probability of drawing any one spade card from a pack of cards is
In a frequency curve of scores the mode was found to be higher than the mean. This shows that the distribution is
The standard deviation of a distribution is 5. The value of the fourth central moment μ4 in order that the distribution be mesokurtic should be