NCERT 2022 | समुच्चय - L15 | Sets | Hindi Medium | Class 11 गणित | Jitendra Sir | 10 AM |

Class 11 के बाद क्या ? Class 12 Hindi Medium की पढ़ाई साल के शुरू से कैसे करें ?

In a class, 30% students study English, 15% study Hindi and 10% study both English and Hindi. One student is selected at random. Find the probability that (i) He studies English if it known that he Hindi (ii) He studies Hindi if it is known that he studies English

Four pipes can fill a reservoir in 15, 20, 30 and 60 hours respectively. The first pipe was opened at 8 am second at 9 am third at 10 am and fourth at 11 am. When will the reservoir be full? 1 pdotmdot b. 2 pdotmdot c. 2. 30 pdotmdot d. 3 pdotmdot

If 1-5 , 6-10 , 11-15 , ..., are the classes of a frequency distribution , then the size of the class is "_______" .

Three bells rings at the interval of 10, 15 and 20 min, respectively. If they all ring at 11 am at once, then What time they will ring together again?

State whether each of the following statement is true or false. Justify your answer.(i) { 2, 3,4, 5 } and { 3, 6} are disjoint sets, (ii) { a , e , i , o, u } and { a , b , c , d } are disjoint sets, (iii) { 2, 6, 10, 14 } and { 3, 7, 11, 15} are disjoint sets. (iv) { 2, 6, 10 } and { 3, 7, 11} are disjoint sets.

If 1-5 , 6 -10 , 11-15 , 16-20, ..., are the classes of a frequency distribution , then the lower boundary of the class 11-15 is "_______" .

1-5 , 6-10 , 11-15 , ....... , are the classes of a distribution , the upper boundary of the class 1-5 is "_______"

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).

The students of a class are offered three languages (Hindi, English and French). 15 students learn all the three languages whereas 28 students do not learn any language. The number of students learning Hindi and English but not French is twice the number of students learning Hindi French but not English. The number of students learning English and French but not Hindi is thrice the number of students learning Hindi and French but not English. 23 students learn only Hindi and 17 students learn only English. The total number of students learning French is 46 and the total number of students learning only French is 11. What is the total strength of the class?