The correct option is B 75815 oz
Weight of 1 packet of rice =2515 oz
2515 oz=25×5+15=1265oz
Weight of 1 packet of wheat =5013 oz
5013 oz=50×3+13=1513oz
Total weight of 1 packet of rice and 1 packet of wheat =(1265+1513)oz
As all the fractions in the equation are unlike fractions, we need to convert them into like fractions.
Multiplying 1265 by 3 to convert the denominator into 15
1265=126×35×3=37815
Multiplying 1513 by 3 to convert the denominator into 15
1515=151×53×5=75515
Now, add the two fractions.
1265+1513
=37815+75515
=378+75515
=113315=75815
Hence, the total weight of 1 packet of rice and 1 packet of wheat =1265+1513=75815 oz