In a certain shop , 70 percent of customers buy mobiles made by company (A) and the rest buy mobiles made by company (B) . A new mobile is made by company (A) . If 90 percent of customers who prefer company (A) and 50 percent of customers who prefer company (B) are expected to buy the new mobile , whats percent of customers are expected to buy the new mobile ?	Choose the correct choice from the following options
A) 70 B) 78 C) 80 D) 82 E) 86
Say there are total of 100 customers in the shop . Thus 70 customers prefer company (A) and 30 customers prefer company(B).   70*0.9= 
<gadget id="calculator">70*0.9</gadget>
<output>63</output>
63 customers who prefer company (A) are expected to buy for the new mobile ;     30*0.5= 
<gadget id="calculator">  30*0.5</gadget>
<output>15</output>
15 customers who prefer company (B) are expected to buy for the new mobile .   Thus total of   63+15= 
<gadget id="calculator">  63+15</gadget>
<output>78</output>
78 members are expected to buy the new mobile, which is 78% of the total number of customers .   Answer: 78.
<result>B</result>
In a certain shop , 70 percent of customers buy mobiles made by company (A) and the rest buy mobiles made by company (B) . A new mobile is made by company (A) . If 90 percent of customers who prefer company (A) and 50 percent of customers who prefer company (B) are expected to buy the new mobile , whats percent of customers are expected to buy the new mobile ?