[計量] GWD11-19
Q19
In a certain region, the number of children who have been vaccinated
against rubella is twice the number who have been vaccinated against
mumps. The number who have been vaccinated against both is twice the
number who have been vaccinated only against mumps. If 5,000 have been
vaccinated against both, how many have been vaccinated only against
rubella?
A.2,500
B.7,500
C.10,000
D.15,000
E.17,500
ANS:C
Thanks.
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