Individual 4881

There are 32 rooms in the hostel. Some have double beds, others have four beds and the rest have 7 beds. There are a total of 139 beds in the hostel. How many are there if a two-digit number gives the numbers of individual species?

Correct answer:

a =  11
b =  10
c =  11

Step-by-step explanation:

139 = 2a+ 4b + 7c a+b+c=32 a>9 b>9 c>9 a=11
b=10
c=11



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