which slot for single ram

My laptop is Lenovo E41-15 which has a single ram slot. It now runs with 4gb ddr3 single channel ram. I bought a new 8gb module but it is a dual channel ram. Will the ram work in my laptop or should i get a single channel ram ???

A1 (slot 1) and B1 (slot 3) are typically reserved for a single channel of the same type, and A2 (slot 2) and B2 (slot 4) are considered to be dual-channel RAM slots.

Question regarding MS Booking for single users and groups, & Synchronization with multiple calendars. ... it allows each individual external to select which time works best for them.