Question

pls ans fast...........​

Answer 1

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Answer 2

CI Xi yi xifi

30-35 32.5 14 455

35-40 37.5 16 600

40-45 42.5 28 1190

45-50 47.5 23 1092.5

50-55 52.5 18 945

55-60 57.5 8 460

60-65 62.5 3 187.5

sigma yi=100 sigmaxifi=

Mean=sigma xifi/sigma Yi

= 4930 /100

=49.3