in a class of 50 students 21 offer beads , 24 offer plantain and 18 offer rice. 3 did beads only , 9 did plantain only , 2 offer rice only and 5 took part in all the three subject. draw a three set on a veen diagram to illustrate the information .
(i) find the number of student who offer plantain and beads only
(ii) exactly two of the subject
(iii) non of the subject
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