Mathematics Book 2 (D2) | 7th Edition | Exercise # 15 B |Q # 5 , 6 & 7 | Ifra Syed | in Urdu\Hindi

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Question No 5 :

There are 15 girls and x boys at a school parade square.
(i) Write down an expression, in terms of x, for the total number of students at the school parade square.

(ii) A student is selected at random. Write down an expression, in terms of x, for the probability
that the student is a girl.
(iii) Given that the probability in (ii) is1/5 , find the value of x .

Question No 6 :

Class of 38 students went on a short trip to
6angkok. Of the 18 boys, 6 of them checked in their luggage at the airport. 8 of the girls did not check in their luggage. If a student is chosen at random, find the probability that the student
(i) is a girl who did not check in her luggage,
(ii) checked in his/her luggage.

Question No 7 :

(a) A class has 16 boys and 24 girls. Of the
16 boys, 3 are left-handed. Of the 24 girls, 2 are left-handed. If a student is chosen at random to clean the whiteboard, find the probability that
the student is

(i) a boy,
(ii) left-handed.
(b) The student chosen to clean the whiteboard in (a) is a girl who is not left-handed. Another student is selected at random from the remaining students to borrow the visualiser from the class next door. Find the probability that the
student is

(i) a boy who is left-handed,
(ii) a girl who is not left-handed.

( D2 ) Ex # 15 B ( Probability of Single Event ) ( Mathematics book 2 ) ( D 2 ) ( NSM 2 ) ( 7th Edition )

( D2 ) Ex # 15 A ( Probability of Single Event ) ( Mathematics book 2 ) ( D 2 ) ( NSM 2 ) ( 7th Edition )

( D3 ) Ex # 1 A ( Quadratic Equations and fuctons ) ( Mathematics book 3 ) ( D 3 ) ( NSM 3 ) ( 7th Edition )

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[syedatoheed]

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[jawahirashraf]

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[bbbananaworld]

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Actually i have a test tomorrow and im really tensed

[ahtishambaloch]

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