Answer:
It depends on the history of colonialism in the area, but a safe bet is Swahili / French and English.
Explanation:
Near the Cote d'Ivoire and Senegal regions the French had influence for many years, so naturally many Africans there speak French.
English is the current language of business and higher education --everyone wants to know English because it's helpful in trade and commerce.
Swahili is a "lingua franca" in East Africa, which means that it's often used as an intermediate for two people who have their own native tongue (say, Yoruba and Igbo).
