Advertisements
Advertisements
प्रश्न
Find the class-mark of 80-90.
उत्तर
Class mark =
`{"Lower class limit + Upper class limit"} /2`
`= {80 + 90} /2`
= 85
APPEARS IN
संबंधित प्रश्न
In an AP, the first term is 2, the last term is 29 and the sum of all the terms is 155. Find the common difference.
The 16th term of an AP is 5 times its 3rd term. If its 10th term is 41, find the sum of its first 15 terms.
The sum of the 4th and 8th terms of an AP is 24 and the sum of its 6th and 10th terms is 44. Find the sum of its first 10 terms.
Find the number of terms of the AP -12, -9, -6, .., 21. If 1 is added to each term of this AP then the sum of all terms of the AP thus obtained.
Sum of the first 14 terms of and AP is 1505 and its first term is 10. Find its 25th term.
A man arranges to pay off debt of ₹36000 by 40 monthly instalments which form an arithmetic series. When 30 of the installments are paid, he dies leaving on-third of the debt
unpaid. Find the value of the first instalment.
Find the number of terms of the AP − 12, −9, −6, ….., 12. If 1 is added to each term of this AP, then find the sum of all terms of the AP thus obtained ?
Which of the following sequences are A.P.? If they are A.P. find the common difference.
2, 4, 6, 8, ...
Is the following sequences are A.P.? If is A.P. find the common difference.
0, –4, –8, –12,...
Write the correct number in the given boxes from the following A. P.
–3, –8, –13, –18,...
Here t3 = 
, t2 = 
, t4 =
, t1 = 
,
t2 – t1 = 
, t3 – t2 = 
∴ a = 
, d = 
Observe the adjacent Venn diagram and write the complement of A.
Find x if x + y = 5, and x - y = 7
Write the lower and the uppper class limit of 35 to 40
In the A.P. 2, –2, –6, –10, ..... common difference (d) is ______.
First term and common difference of an A.P. are 12 and 4 respectively. If tn = 96 find n.
Find the eighteenth term of the A.P.7.13,19,25,....
Find tn for the A.P. 3,8,13,18,.....
Find out the ratio of 1 mm to 1 cm.
If for an A.P. the first term is 2 and the common difference is 3, then find first three-term of A.P.
