Question is in the image

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Standard deviation of 19,29,21,22,23

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?