Alloy A contains 40% gold and 60% silver. Alloy B contains 35% gold and 40% silver and 25% copper. Alloys A and B are mixed in the ratio of 1:4 .What is the ratio of gold and silver in the newly form
A). 20% and 30%
B). 36% and 44%
C). 25% and 35%
D). 49% and 36%
In a college, the ratio of the number of boys to girls is 8 : 5. If there are 160 girls, the total number of students in the college is
A). 100
B). 100
C). 100
D). 416
If 76 is divided into four parts proportional to 7, 5, 3, 4, then the smallest part is:
A). 12
B). 15
C). 16
D). 19
Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is:
A). 2:5
B). 3:5
C). 4:5
D). 5:4
The sum of three numbers is 98. If the ratio of the first to second is 2 : 3 and that of the second to the third is 5 : 8, then the second number is:
A). 10
B). 20
C). 30
D). 40