Step 1 :The question is asking for the frequency of marks in the [61-70] mark bin. This means we need to count how many marks fall within this range.
Step 2 :First, we list all the marks: \(86, 79, 58, 56, 79, 92, 62, 90, 74, 71, 65, 66, 46, 48, 50, 67, 90, 87, 72, 68, 59, 58, 70, 71, 75, 77, 84, 81, 73, 83\).
Step 3 :Then, we select the marks that fall within the [61-70] mark bin: \(62, 65, 66, 67, 68, 70\).
Step 4 :We count the number of marks in this bin, which is 6.
Step 5 :Final Answer: The frequency of marks in the [61-70] mark bin is \(\boxed{6}\).