The class marks or a distribution are 15,20,25,.....,40.what is the class corresponding to 45?
Answers
Answered by
2
A. P. = 15,20,25.........40
a=15
d=20-15=5
Now,
an= a+(n-1)d
45= 15+5n-5
5n=45-15+5
=35
n=7
Answer is 7
a=15
d=20-15=5
Now,
an= a+(n-1)d
45= 15+5n-5
5n=45-15+5
=35
n=7
Answer is 7
Answered by
0
a=15
d=20-15=5
An=40
n=?
an=a+n-1×d
40=15+5n-5n
40-15=5n-5n
25=5n-5
25+5=5n
30=5n
n=6
a+44d
15+44×5
15+220
=235
d=20-15=5
An=40
n=?
an=a+n-1×d
40=15+5n-5n
40-15=5n-5n
25=5n-5
25+5=5n
30=5n
n=6
a+44d
15+44×5
15+220
=235
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