NCERT 2022 | समुच्चय - L13 | 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 ?

If R is a relation from set A={11 , 12 , 13} to set B={8, 10 , 12} defined by y=x-3, then write R^(-1)dot A. {(8,11),(10,13)} B. {(8,11),(10,12)} C. {(10,13),(10,11)} D. none of these ANSWER: A

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).

There are 50 students admitted to a nursery class. Some students can speak only English and some can speak only Hindi. Ten students can speak both English and Hindi. If the number of students who can speak English is 21, then how many students can speak Hindi, how many can speak only Hindi and how many can speak only English? (a) 21, 11 and 29 respectively (b) 28, 18 and 22 respectively (c) 37, 27 and 13 respectively (d) 39, 29 and 11 respectively

If two circles with cenre (1,1) and radius 1 and circle with centre (9,1) and radius 2 lies opposite side of straight line 3x+4y=lamda . The set of values of lamda is (A) [12, 21] (B) [13,22] (C) [10,18] (D) [15,24]