**NIOS solved assignment 2020-21 **: National Institute of Open Schooling (NIOS) Complete Solved Mathematics (211) assignment (TMA).

## Mathematics (211)

2020-2021

Tutor Marked Assignment

Table of Contents

**NOTE:** (i) All questions are compulsory. The marks allotted for each question are given beside the questions.

(ii) Write your name, enrollment number, AI name and subject on the top of the first page of the answer sheet.

**1.Answer any one of the following questions. 2**

**(a) By selling a shirt to a customer for Rs. 749 a shopkeeper earns a profit of 7%. Find the cost price of the shirt.**

**Answer:**

**2.Answer any one out of the following questions.**

**(b) In figure, <ABC = 69° and <ABC = 31°, find <BDC.**

**Answer:**

**3. Answer any one out of the following questions. 2**

**(b) The area of a trapezium is 64 cm**^{2}. If its parallel sides are 10cm and 6 cm, then find the distance between the parallel sides.

^{2}. If its parallel sides are 10cm and 6 cm, then find the distance between the parallel sides.

**Answer:**

**4.Answer any one of the following questions. 4**

**(a) In the below given figure, ‘O’ is the midpoint of AB and CD. Prove that AC = BD and AC || BD.**

**Answer:**

**5.Answer any one out of the following questions. 4**

**(b) The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is 60°, and the angle of elevation of the top of the second tower from the foot of the first tower is 30°. Find the Distance between the two towers and also the height of the other tower.**

**Answer:**

**6.Prepare any one project out of the following projects given below. 6**

**(a) Conduct a survey of atleast 50 households from your locality/village, regarding population and family income.**

(i) Present the data related to family members in tabular form mentioning frequencies.

(ii) Calculate the average family size. How many families are above the average family size?

(iii) Draw the Bar graph for top 10 earning families

(i) Present the data related to family members in tabular form mentioning frequencies.

(ii) Calculate the average family size. How many families are above the average family size?

(iii) Draw the Bar graph for top 10 earning families

**Answer: (i)**

**(ii)**

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