In a school having roll strength 286, the ratio of boys and girls is 8:5. If 22 more girls get admitted into the school, the ratio of boys and girls becomes  Answers.
A) 12:7 B) 10:7 C) 8:7 D) 4:3 E) none
Solution: Boys: girls = 8:5; (let the boys = 8x; girl = 5x)   Total strength = 286;   8x+5x = 286;   13x = 286;   Or, x = 286/13= 
<gadget id="calculator">286/13</gadget>
<output>22</output>
22;   Boys= 176 and girls = 110;   22 more girls get admitted then number of girls become,   (5x+22) = 110+22= 
<gadget id="calculator">110+22</gadget>
<output>132</output>
132;   Now, new ratio of boys and girls= 176:132 = 4:3.   Answer: Option 4:3
<result>D</result>
In a school having roll strength 286, the ratio of boys and girls is 8:5. If 22 more girls get admitted into the school, the ratio of boys and girls becomes