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musa ezekiel
Questions (3)
what is pin hole cemera
2 answers
400 views
a class contains 15 boys and 21 girls.a student is chosen at random.what is the probability that a boy is chosen?
4 answers
1,585 views
A box contains 40 oranges,12 of which are unripe.i pick one at random.what is the probability that it is (a)ripe, (b)unripe?
4 answers
2,683 views
Answers (3)
pin hole cemera are ancient cemera which have a pin hole in front and the image form is inverted.
s=(40 orange) pr=no of required outcome=40 ripe oranges=28 unripe oranges=12 pr(ripe)=28/40 =7/10 pr(unripe)=12/40=3/10
s=(2 red balloon,10 green balloon,16 yellow balloon,7 orange balloon) pr=no of required outcome=35 pr(green)=10/35 pr(orange)=7/35 pr(green or orange)=10/35+7/35=17/35
