In Gabriel's sheep herd, every sheep has either fleas or lice or both. Half of the sheep have lice, and 84 sheep have both pests. If 94 sheep have lice, how many sheep have only fleas?	Choose the most appropriate option:	A) 10	B) 20	C) 84	D) 94	E) 178
n(Lice) = n(Only lice) + n(Both lice and fleas)   n(Both lice and fleas) = 84   n(Lice) = 94   n(Only lice) = 94-84= 
<gadget id="calculator">94-84</gadget>
<output>10</output>
10   Since, it is also said that exactly half the sheep have lice, it can be inferred that half the number of sheep is 94.   Therefore, the total number of sheep having only fleas is 10   10NS:(Option 10)
<result>A</result>
In Gabriel's sheep herd, every sheep has either fleas or lice or both. Half of the sheep have lice, and 84 sheep have both pests. If 94 sheep have lice, how many sheep have only fleas?