There are 80 camel heads and 122 humpbacks in the herd. How many in a herd of one-horned and two-humped?
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Suppose all camels are single-horned,then
122-80 = 42 are two-humped
80-42 = 38 single-spangled
Check
42 * 2 + 38 = 122
122-80 = 42 are two-humped
80-42 = 38 single-spangled
Check
42 * 2 + 38 = 122
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