Answers

2016-01-25T19:51:32+05:30
The numbers which are divisible by 5 between 6 and 34 are 10,15,20,25,30.
Average=(10+15+20+25+30)/5=100/5=20.
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2016-01-25T19:57:35+05:30
The numbers that are divisible are 10,15...............30
therfore its a progreesion.
here a=10,n=5,l=30
                                   Sn=(n/2)(a+l)
                                   Sn=(5/2)(10+30)
                                   Sn=5*20
                                   Sn=100
average=sn/n
              =100/5
              =20
your required answer is 20.
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