Data: combine and interpret

Exercise and reference answers

Questions

1. Answer

   D

   Question

   Remove E; add 10 to each A–D class. Mean-size rise?

2. Answer

   A

   Question

   Mean over Mon–Fri must be 180. Find Friday−Thursday.

3. Answer

   D

   Question

   Spend 60% of pooled unspent funds. Amount left?

4. Answer

   C

   Question

   Profit each: pen ₹2, book ₹3, bag ₹5, other ₹1. Total?

5. Answer

   B

   Question

   Find the mean mark of all pupils together.

6. Answer

   B

   Question

   Which factory had the highest percentage of non-defective output?

Instructions

Read each display, then choose the answer.