50 persons like apple. 7 like orange and mango dislike apple. 10 like mango and apple and dislike orange. 4 like all. How many people like apple? Select the correct option:	A) 47	B) 46	C) 54	D) 57	E) 62
orange+mango-apple=7   mango+apple-orange=10   apple=50   orange+mango+apple=4   50+10+4-7= 
<gadget id="calculator">50+10+4-7</gadget>
<output>57</output>
57 like apple   ANSWER:57
<result>D</result>
50 persons like apple. 7 like orange and mango dislike apple. 10 like mango and apple and dislike orange. 4 like all. How many people like apple?