Two numbers are in the ratio 3 : 4. If their L.C.M. is 84. what is sum of the numbers?	Choose one:	A) 49	B) 56	C) 76	D) 84	E) 85
Explanation:   Let the numbers be 3x and 4x   LCM of 3x and 4x = 12x (Since LCM of 3 and 4 is 12. Hence LCM of 3x and 4x is 12x)   Given that LCM of 3x and 4x is 84   =&gt; 12x =84   =&gt; x = 84/12= 
<gadget id="calculator">84/12</gadget>
<output>7</output>
7   Sum of the numbers= 3x + 4x   = 7x   3  + 4= 
<gadget id="calculator">3  + 4</gadget>
<output>7</output>
7x= 7 x 7 = 49   49nswer: Option 49
<result>A</result>
Two numbers are in the ratio 3 : 4. If their L.C.M. is 84. what is sum of the numbers?