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Help me please if you can

Help Me Please If You Can class=

Sagot :

Answer:

Step-by-step explanation:

Red blood cells : Platelets = 680 : 40  = (680÷10)  : (40÷10)

                                           = 68 : 4 = (68÷4) : (4÷4)

                                           =  17 : 1