English

Find the Common Difference of the A.P 3, 5, 7, .......... - Algebra

Advertisements
Advertisements

Question

Find the common difference of the A.P 3, 5, 7, ..........

Sum

Solution

t1 = 3, t2 = 5, t3 = 7

d = t2 - t1

= 5 - 3

d = 2

shaalaa.com
  Is there an error in this question or solution?
2015-2016 (July)

APPEARS IN

RELATED QUESTIONS

Following table shows the points of each player scored in four games:

Player Game 1 Game 2 Game 3 Game 4
A 14 16 10 10
B 0 8 6 4
C 8 11 Did not play 13

Now answer the following questions:

  1. Find the mean to determine A’s average number of points scored per game.
  2. To find the mean number of points per game for C, would you divide the total points by 3 or by 4? Why?
  3. B played in all the four games. How would you find the mean?
  4. Who is the best performer?

The enrolment in a school during six consecutive years was as follows:

1555, 1670, 1750, 2013, 2540, 2820

Find the mean enrolment of the school for this period.


The` "n"^(th)` term of the A. P. 3, 8, 13, 18, ............ is 148. Find n 


If `barx` is the mean of x1, x2 ............xn and `bary` is the mean of y1, y2, …….yn and `barz` is the mean of x1, x2 ............xn, y1, y2, ……….yn then `barz` =?


The following table shows the electricity (in units) used by 25 families of Eklara village in a month of May. Complete the table and answer the following questions.

Electricity used
(units) `bb(x_i)`
No. of Families
(frequency) `bb(f_i)`
`bb(f_ix_i)`
30 7 _________
45 2 __________
60 8 __________
75 5 __________
90 3 __________
  N = _________ `sum f_ix_i` = ______
  1. How many families use 45 units electricity?
  2. State the score, the frequency of which is 5.
  3. Find N, and `sum f_ix_i`
  4. Find the mean of electricity used by each family in the month of May.

Ashish studies for 4 hours, 5 hours, and 3 hours respectively on three consecutive days. How many hours does he study daily on average?


In a research laboratory scientists treated 6 mice with lung cancer using natural medicine. Ten days later, they measured the volume of the tumor in each mouse and given the results in the table

Mouse marking 1 2 3 4 5 6
Tumor Volume (mm3) 145 148 142 141 139 140

Find the mean


The mean of the square of first 11 natural numbers is


The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the mean mark


The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the minimum mark obtained


The mean height of 11 students in a group is 150 cm. The heights of the students are 154 cm, 145 cm, Y cm, Y + 4 cm, 160 cm, 151 cm, 149 cm, 149 cm, 150 cm, 144 cm and 140 cm. Find the value of Y and the heights of two students?


The mean of first fifteen even numbers is ____________


The average of two numbers are 20. One number is 24, another number is ____________


Which measures of central tendency get affected if the extreme observations on both the ends of a data arranged in descending order are removed?


If the arithmetic mean of 8, 4, x, 6, 2, 7 is 5, then the value of x is ______.


Find the mean of the first ten even natural numbers.


The following are weights (in kg) of 12 people. 70, 62, 54, 57, 62, 84, 75, 59, 62, 65, 78, 60. How many people weigh above the mean weight?


Find the mean of first six multiples of 4.


In a class of 100 students there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class is 72, then what is the average of the girls?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×