Standard Math Sample Paper Maths Term 2 #!#ये कर लिया तो 40 Number पक्के

In a class , 40 student like Maths, 50 students like Physics and 60 students like Chemistry. 30 students like both Maths and Physics, 20 students like both Physics and Chemistry and none of them like both Maths of Chemistry . Find the total number of students who like only Maths, only Physics and only Chemistry.

The average of 13 numbers is 42. If a 14th number is included, then the average becomes 44. What is the 14th number? 13 संख्याओं का औसत 42 है | यदि 14वीं संख्या को शामिल कर लिया जाए, तो यह औसत 44 हो जाता है | 14वीं संख्या कौन सी है ?

A and B can finish a work together in 30 days, B and C can finish the same work together in 24 days and A and C can finish the same work together in 40 days. If all three work together, how long will it take them to complete the work? A और B किसी कार्य को 30 दिनों में समाप्त कर सकते हैं | B और C इसी कार्य को 24 दिनों में तथा A और C इसी कार्य को एक साथ 40 दिनों में समाप्त कर सकते हैं | यदि ये तीनों साथ कार्य करें, तो उन्हें कार्य समाप्त करने में कितना समय लगेगा ?

A simple of 25 variates has mean 40 and standard deviation 5 and a second sample of 35 variates has mean 45 and the standard deviation 2. Find the mean and standard deviation of the two samples of variates , taken together.

In an examination, the marks for physics and chemistry papers are 25 each, whereas maximum marks for maths paper is 100. The number of ways in which a student can score 50 marks is: [assume that the marks are awarded in non-negative integral values] 716 b. 676 c. 605 d. none of these

In our coaching there were 200 students enrolled for DI, 150 for English and 150 for Maths of these 80 students enrolled for both DI and English. 60 students enrolled for Maths and English, while 70 students enrolled for DI and Maths. Some ofthese students enrolled for all the three subjects. Diwakar teaches those students who are enrolled for DI classes only. Priyanka teaches those students whoare enrolled for English only and Varun teaches those students who are enrolled for Maths only. Sarvesh is a senior most faculty therefore, he can teach all the three subjects. Students always prefer a specialist for their respective subjects. If Diwakar teaches 80 students then the other three faculty can be arranged in terms of the number of students. taught as:

The mean and standard deviation of some data for the time taken to complete a test are calculated with the Number of observations = 25, mean=18.2s, standard deviation = 3.25s. Further, another set of 15 observations x_1, x_2, ...x_15, also in seconds, is now available and we have sum_(i=1)^15 x_i = 279 and sum_(i=1)^15 (x_i)^2 = 5524, then the standard deviation based on all 40 observations is

This interference film is used to measure the thickness of slides, paper, etc. The arrangement is as shown in fig. For the sake of clarity, the two strips are shown thick. Consider the wedge formed in between strips 1 and 2. If the interference pattern because of the two waves reflected from wedge surface is observed, then from the observed data we can compute thickness of paper, refractive index of the medium filled in wedge, number of bonds formed, etc. Considre the strips to be thick as compared to wavelength of ligth and light is incident normally. Neglect the effect due to reflection from top surface of strip 1 and bottom surface of strip 2. Take L = 5 cm and lambda_(air) = 40 nm . Consider an air wedge formed by two glass plates. having refractive index 1.5 by placing a piece of paper of thickness 20 mm. Determine the number of dark bands formed.

In a survey of xavirs's school of Bhubaneswar of 200 students, It was found that 120 study math, 90 study physics, 70 study shemistry, 40 study math and physics, 30 study physics and chemistry, 50 study chemistry and math and 20 study none of these subjects then the number of students study all the subjects is :