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10) (i)6/10=3/5
(ii) 4/10=2/5
11) (i)(72+65)/400
=137/400
(ii) (65+70+63)/400
=198/400=99/200
(iii) 59/400
(iv) (72+70+63)/400
=205/400=41/80
12) Frequency of 5=200×3/8=75
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