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

If each of a set of observations of a variable is multiplied by a constant (non-zero) value, the variance of the resultant variable