You've made a mistake in copying this problem because this statement: A: 14 sell plantain and maize contradicts these statements: B: 12 of them sell plantain C: 5 of them sell maize, Since 14 sell both plantain and maize, as A states, then certainly there are at least 14 that sell plantain, not merely 12 as B states. Also since 14 sell both plantain and maize, as A states, then certainly there are at least 14 that sell maize, not merely 5 as C states. The 14 has to be incorrect. Please correct the numbers in the thank-you note and I'll help you. Maybe the 14 should have been 4. That's a guess at what your error might have been. Edwin