In a family having three children, there may be no girl, one girl, two girls or three girls. So, the probability of each is 1/4 . Is this correct? Justify your answer.
Will the median class and modal class of grouped data always be different? Justify your answer.
Is it true to say that the mean, mode and median of grouped data will always be different? Justify your answer.
The median of an ungrouped data and the median calculated when the same data is grouped are always the same. Do you think that this is a correct statement? Give reason.
In any situation that has only two possible outcomes, each outcome will have probability 1/2 . True or false? Why?
Is it correct to say that an ogive is a graphical representation of a frequency distribution? Give reason.
The mean of ungrouped data and the mean calculated when the same data is grouped are always the same. Do you agree with this statement? Give reason for your answer.
A school has five houses A, B, C, D and E. A class has 23 students, 4 from house A, 8 from house B, 5 from house C, 2 from house D and rest from house E. A single student is selected at random to be the class monitor. The probability that the selected student is not from A, B and C is
(A) 4/23 (B)6/23(C)8/23 (D)17/23
One ticket is drawn at random from a bag containing tickets numbered 1 to 40. The probability that the selected ticket has a number which is a multiple of 5 is
(A) 1/5 (B)3/5 (C)4/5 (D)1/3
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