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Ans 1:
Class : Class 8
12:320=3:80 in its simplest form. It is not equal to 3:81. You may simplify it like 12/320 divide both numerator and denominator by 4. You will surely get the answer as 3:80.
Ans 2:
Class : Class 8
I have confusion in statement 1 but 2nd statement are correct.
1st statement
in first no of pages in symmetry chapter is 12.
total no pages is 320.
the ratio is 12:320
=3:81 = 1 :27
2nd statement
2 out of 5 can participate means 40% of the student
the 40% of 100 is 40
the percentage of students that participate in the quiz = 40/100*100
40%
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Ans 1:
Ans 7:
Class : Class 6
The answer should be D not A. In the first line they have used BODMAS, but in the second they have not and if we use BODMAS we will get option d.
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Ans 6:
Class : Class 9
approach to this problem is not given correctly in solution. thought the answer given is correct.
Ans 15:
Class : Class 7
QUESTION IS NOT WRONG IN THIS WE HAVE TO SEE THE OPTION AND THEN DO IT . LIKE WE CAN ASSUME THAT TOTAL AMOUNT WAS OPTION B THEN DO THE CALLCULATION BUT FOR B WE DO NOT GET THE AMOUNT LEFT 1330