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Mathematics (311) -Tutor Marked Assignment 2021-22
Note :
(i) All questions are compulsory.
The Marks allotted for each question are given beside the questions.
(ii) Write your name, enrollment
numbers, AI name and subject on the first page of the answer
1. Answer any one of the following
questions in about 40-60 words.
(a) In a group of students, 100
students know Hindi, 45 know English and 30 know both. Each of the students
knows either Hindi or English. How many students are there in the group?
(b) A bag containing 8 red and 5
green balls. Two balls are drawn without replacement (simultaneously) from the
bag. Find the probability that both the balls drawn are green.
2. Answer any one of the following
questions.
(a) There are 15 boys and 10 girls
in your class. A four member committee is to be formed from the students of
your class. In how many ways this can be done if the committee consists at
least three girls?
(b) If z =1 show that ( ) 1, 11zzz−≠
−+is a pure imaginary number. What will you conclude if z = 1?
3. Answer any one of the following
questions.
(a) If the ratio of three sides of a
triangle is a: b: c = 7:8:9 then show that cosA: cosB: cosC=14: 11: 6.
(b) Find the radius of the circular
section of the sphere x 2 + y2 + z2 = 49 by the plane 2x + 3y– z – 5 14 = 0.
4. Answer any one of the following
questions.
(a) How conic sections are
generated. From your surrounding give four examples of each of circle,
parabola, ellipse and hyperbola. Prepare a list of their different
informations.
(b) The sum of first three terms of
a Geometric Progression is 13 12 and their product is –1. Find Geometric
Progression G.P.
5. Answer any one of the following
questions.
(a) (i) Give an example of a
function whose graph is symmetrical about origin and draw the graph.
(ii) Express 7i7 + 7i6 + 3i3 – 2i2 +
1 in the form of a + bi
(b) The product of three terms of a
GP is 512. If 8 is added to the first term and 6 to the second term, find the
new terms form an AP.
6. Prepare any one project of the
following projects given below.
(a) Observe a one-day cricket match
to be held in the year 2016. Prepare a project report
indicating the performance and comparison with respect to the following
points:
(i) Range of the individual scores of the players.
(ii) Compute team wise mean deviation score.
(iii) Prepare team wise grouped frequency distribution tables, showing the
number of over
as class intervals and corresponding scores as frequencies.
(iv) Represent the above frequency distribution table (Part iii) with the help
of histogram
(b) Conduct a survey at population
in your locality taking a sample of atleast 50 families.
Prepare a project report with respect to the following points:
(i) Represent the data showing age using class intervals.
(ii) Compute the average income of the families.
(iii) Literacy level of the population in terms of Elementary, Secondary,
Senior Secondary,
Graduation and above.
(iv) Find the variance of the income of the families.
(v) Represent the data in part (iii) with the help of bar graph.
Session 2021-22 (Mathematics&311)
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