Forum

Square-Square Root & Cube-Cube Root

How many natural numbers lie between 182 and 192?
(a) 30 (b) 37 (c) 35 (d) 36

Square-Square Root & Cube-Cube Root

Which of the following will have 1 at its units place?
(a) 192 (b) 172 (c) 182 (d) 162

Square-Square Root & Cube-Cube Root

Which of the following is the square of an odd number?
(a) 256 (b) 361 (c) 144 (d) 400

Data Handling

The following histogram shows the frequency distribution of teaching
experiences of 30 teachers in various schools:
(a) What is the class width?
(b) How many teachers are having the maximum teaching experience
and how many have the least teaching experience?
(c) How many teachers have teaching experience of 10 to 20 years?

Data Handling

In a hypothetical sample of 20 people, the amount of money (in
thousands of rupees) with each was found to be as follows:
114, 108, 100, 98, 101, 109, 117, 119, 126, 131, 136, 143, 156,
169, 182, 195, 207, 219, 235, 118.
Draw a histogram of the frequency distribution, taking one of the
class intervals as 50–100

Data Handling

Construct a frequency distribution table for the following weights (in
grams) of 35 mangoes, using the equal class intervals, one of them is
40 – 45 (45 not included).
30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53,
55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68.
(a) How many classes are there in the frequency distribution table?
(b) Which weight group has the highest frequency?

Data Handling

The weights (in kg) of 30 students of a class are:
39, 38, 36, 38, 40, 42, 43, 44, 33, 33, 31, 45, 46, 38, 37, 31, 30, 39, 41, 41, 46, 36, 35, 34, 39, 43, 32, 37, 29, 26.

Prepare a frequency distribution table using one class interval as (30– 35), 35 not included.

(i) Which class has the least frequency?

(ii) Which class has the maximum frequency?

Data Handling

The marks obtained (out of 20) by 30 students of a class in a test are
as follows:
14, 16, 15, 11, 15, 14, 13, 16, 8, 10, 7, 11, 18, 15, 14, 19, 20, 7, 10,
13, 12, 14, 15, 13, 16, 17, 14, 11, 10, 20.
Prepare a frequency distribution table for the above data using class
intervals of equal width in which one class interval is 4 –8 (excluding
8 and including 4).

Data Handling

Following are the number of members in 25 families of a village:
6, 8, 7, 7, 6, 5, 3, 2, 5, 6, 8, 7, 7, 4, 3, 6, 6, 6, 7, 5, 4, 3, 3, 2, 5.
Prepare a frequency distribution table for the data using class intervals
0 –2, 2 –4, etc

Data Handling

Ritwik draws a ball from a bag that contains white and yellow balls.
The probability of choosing a white ball is 2/9 . If the total number of
balls in the bag is 36, find the number of yellow balls.