Question

4. If x= -2/3 and y= 1/4 , find (×+y) ÷ (x-y).
5.using appropriate properties,find
2/5 multiple by -3/7-1/14-3/7 multiple by 3/5
6.represent -5/6,9/-11 on the number line
7.verify that -(-x) for x= -2/5z
8. Arrange in ascending order
-3/4,5/-12,-5/16,7-24
9. By what number should 3/-14 be multiplied so as to get 5/12
10. 10. A floor is 2 1/4 m long and 1 3/4m wide . A square carpet of side 1 1/2m is laid on the floor.
Find the area of the floor that is not carpeted.
11. A letter is chosen at random from the letter of the word ASSASSINATION . Find the
probability that the letter chosen is a i. Vowel ii. Consonant
12.The marks obtained by 40 students of a class in an examination are given below :- 8,47,22,31,17, 13, 38, 26, 3, 34, 29, 11, 22,7, 15, 24, 38, 31, 21, 35, 42, 24, 45, 23,21, 27, 29, 49, 25, 48, 15, 18, 27, 19, 45, 14, 34, 37, 34, 21.
Prepare a frequency distribution table , starting with a class interval 0-10 ( where 10 is not included ).etc
13.A bag contains 5 red balls, 8 white balls, 4 green balls and 7 black balls . If one ball is drawn at random . Find the probability that it is
i. Black
ii. Red
iii. Not green
14.Find three consecutive even numbers whose sum is 186.

15.The numerator of a fraction is 3 less than the denominator . If both the numerator anddenominator are increased by 2, the new fraction becomes 6/7 . Find the original fraction .

Answer 1

Answer:

4.11/5

Step-by-step explanation:

(x+y) / (x-y)=(2/3+1/4) / (2/3-1/4)

=(8/12+3/12) / (8/12-3/12)

=11/12 / 5/12=11/12*12/5=11/5

Answer 2

Answer:

This is ur answer:-

Step-by-step explanation:

9. 5/12 ÷ -3/14. 5/12 * 14/-3. = 35/-18.

= -35/18 (bcoz you have to make it into standard form)

10. area of floor = 2/4 * 3 /4 = 1/2 * 3/4 = 3/8 m²

area of carpet = 1/2 * 1/2 = 1/4 m²

area that's not carpeted = 3/8- 1/4 = 12-8 / 32

= 4/32 = 1/8

the area which is not carpeted is 1/8 m².

14. Let one of the even nos. be x.

so, other no. are x+2 and x+4.

we have,

x+(x+2)+(x+4)= 186

⇒3x + 6 = 186

 

⇒ 3x = 180 

⇒ x = 60 

∴ The three consecutive even no. are,

x= 60,

x+2 = 62, and

x+4 = 64