Question

A teacher asked each student of a class to
write down the number of classmates with
the same surname as his, as well as the
plumber of classmates whose birthday is the
same as his. Among the answers received,
each of the numbers 0, 1, 2, ... 10 has
appeared. Find the minimum number of
students in the class.​

Answer 1

A teacher asked each student of a class to

write down the number of classmates with

the same surname as his, as well as the

plumber of classmates whose birthday is the

same as his. Among the answers received,

each of the numbers 0, 1, 2, ... 10 has

appeared. Find the minimum number of

students in the class.​