The table given below shows the number of pens sold by two shopkeepers P and Q in 5 months. Shopkeeper Months P Q A 100 10 B 80 20 C 40 120 D 30 60 E 10 50 J1 = The value of average number of pens sold by P in all five months. J2 = The value of average number of pens sold by Q in all five months. What is the value of ( J1 J2 ) ?
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