chapter is data handling class 7
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Step-by-step explanation:
1. Highest number is 9 and Lowest number is 1
2. mean = sum of observation/ number of observation
=1*1+2*2+3*1+4*3+5*5+6*4+7*2+8*1+9*1/20
=1+4+3+12+25+24+14+8+9/20
=8+12+49+14+17/20
=100/20
=10/2
=5
mean=5
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