Mean of 50 observations was found to be 80.4. But later on, it was discovered that 96 was misread as 69 at one place. Find the correct mean.
A class consists of 50 students out of which 30 are girls. The mean of marks scored by girls in a test is 73 (out of 100) and that of boys is 71. Determine the mean score of the whole class.
The scores (out of 100) obtained by 33 students in a mathematics test are as follows:
69, 48, 84, 58, 48, 73, 83, 48, 66, 58, 84000
66, 64, 71, 64, 66, 69, 66, 83, 66, 69, 71
81, 71, 73, 69, 66, 66, 64, 58, 64, 69, 69
Represent this data in the form of a frequency distribution
The value of π upto 35 decimal places is given below:
3. 14159265358979323846264338327950288
Make a frequency distribution of the digits 0 to 9 after the decimal point.
The blood groups of 30 students are recorded as follows:
A, B, O, A, AB, O, A, O, B, A, O, B, A, AB, B, A, AB, B,
A, A, O, A, AB, B, A, O, B, A, B, A
Prepare a frequency distribution table for the data.
The following observations are arranged in ascending order :
26, 29, 42, 53, x, x + 2, 70, 75, 82, 93
If the median is 65, find the value of x.
Heights (in cm) of 30 girls of Class IX are given below:
140, 140, 160, 139, 153, 153, 146, 150, 148, 150, 152,
146, 154, 150, 160, 148, 150, 148, 140, 148, 153, 138,
152, 150, 148, 138, 152, 140, 146, 148.
Prepare a frequency distribution table for this data.
As the number of tosses of a coin increases, the ratio of the number of heads to the total number of tosses will be 1/2 . Is it correct? If not, write the correct one.
Can the experimental probability of an event be greater than 1? Justify your anwer.
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