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because this is my homework
Today's Maths homework.
1. In a party of 80 people, 60 had vannilla ice cream, 35 had chocolate ice cream. All the people had at least one ice cream. Then how many of them had,
(i) both vannilla and chocolate ice cream.
(ii) only Vannilla ice cream
(iii) only chocolate ice cream.
2. In a school, all students play either Hockey or Cricket or both. 400 play Hockey, 250 play Cricket and 120 play both games. Find
( i) the no. Of. Students who play only Hockey.
(ii) The no. Of. Students who play only cricket.
(iii) The total no. Of. Students in the school.
need is the order what u followed in school
writen answers are welcomed
Answers
Answer:
these are sets chapter questions too :)
1.n(t)=80=total people
n(v)=60=had vanilla icecream
n(c)=35=had chocolate icecream
(I) total =vanilla+chocolate-both
n(t)=n(v)+n(c)-n(vnc)
80=60+35-n(vnc)
80-95=-n(vnc)
-15=n(vnc)
15=n(vnc)
(ii) only vanilla=have vanilla-have both
n(v')=n(v)-n(vnc)
n(v')=60-15
n(v')=45
(iii)only choclate=have chocolate-have both
n(c')=n(c)-n(vnc)
n(c')=35-15=20
2.n(h)=400=play hockey
n(c)=250=play cricket
n(hnc)=120=play both hockey and cricket
(I)only hockey=play hockey-play both
n(h')=n(h)-n(hnc)
n(h')=400-120=280
(ii)only cricket=play cricket -play both
n(c')=n(c)-n(hnc)
n(c')=250-120=130
(iii)total students=play cricket+play hockey-play both
n(t)=n(c)+n(h)-n(hnc)
n(t)=400+250-120=650-120=530
hope it helped you :)
good night:)
Answer:
hii (≡^∇^≡)
how are you??