Question

pls answer this question in detail
no useless and incorrect answer plz​

Answer 1

Answer:

France bands and artists throughout the year of experience and skills will go through it a

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Answer 2

$class \: interval \: frequency \: c.f \\ 10 - 20 \: \: \: \: 12 \: \: \: \: \: \: 12 \\ 20 - 30 \: \: \: \: 30 \: \: \: \: \: \: 42 \\ 30 - 40 \: \: \: \: {f}^{1} \: \: \: \: \: \: 42 + {f}^{1} \\ 40 - 50 \: \: \: \: 65 \: \: \: \: \: \: 107 + {f}^{1} \\ 50 + 60 \: \: \: \: {f}^{2} \: \: \: \: \: \: 107 + {f}^{1} + {f}^{2} \\ 60 + 70 \: \: \: \: 25 \: \: \: \: \: \: 132 + {f}^{1} + {f}^{2} \\ 70 + 80 \: \: \: \: 18 \: \: \: \: \: \: 150 + {f}^{1} + {f}^{2} \\ \\ let \: frequency \: of \: the \: class \: 30 - 40 \: be \: {f}^{1}$