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6-15% of the total number of biscuits in a jar is 30. The total number of biscuits is
(A) 50
(B) 150
(C) 200
(D) 250

7-A number when increased by 12% gives 224. What is the number?
(A) 200
(B) 210
(C) 215
(D) 205

8-What percent of 3% in 5%?
(A) 45%
(B) 55%
(C) 60%
(D) 65%

9-In an examination 35% of students passed and 455 failed. Total number of
students appeared for the examination is
(A) 500
(B) 600
(C) 700
(D) 800

10-Value of 28% of 450 + 45% of 280 is
(A) 150
(B) 157
(C) 252
(D) 224