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Asked/Added Questions From NCERT:


Question 1. Asked on :13 January 2019:11:53:09 AM

 A bag contain slips bearing from 1-89. A slip is drawn at random from the bag. Find the probability that the slip drawn has: 

(a) A number written on it such that sum of its digit is 11.

(b) A number greater than 63 written on it. 

-Added by Akki chauhan Mathematics » Probability

Answer:

Himanshi Verma

 Let 'x' be the number of boys and 'y' be the number of girls.


To find the total marks


The total marks of boys = 42x


The total marks of girls = 45y


Total number of boys and girls = x + y


To find the ratio


The total marks of boys and girls = 44(x + y)


Then we can write


44(x + y) = 42x + 45y


44x + 44y = 42x + 45y


2x = y


x/y = 1/2


Therefore the ratio of the number of boys to the number of girls is 1:2


-Answered by Himanshi Verma On 20 January 2019:05:29:47 PM(931Average Rating Based on rating)

Answer:

Master Purushottam

Let 'x' be the number of boys and 'y' be the number of girls.


To find the total marks


The total marks of boys = 42x


The total marks of girls = 45y


Total number of boys and girls = x + y


To find the ratio


The total marks of boys and girls = 44(x + y)


Then we can write


44(x + y) = 42x + 45y


44x + 44y = 42x + 45y


2x = y


x/y = 1/2


Therefore the ratio of the number of boys to the number of girls is 1:2


-Answered by Master Purushottam On 23 August 2019:11:37:23 PM(4737Average Rating Based on rating)

 

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