(i)[3]
Rani purchases 4 identical vests, 3 identical sweaters and 1 coat. Each vest is priced at $5.50 and the coat costs $90. The mean cost of Rani’s 8 items is $29. Find the cost of a sweater.
(ii)[2]
Diksha buys 1 hat and 4 identical shirts. The mean cost of Diksha’s 5 items is $26 and the standard deviation is $0$. Explain how you know that Diksha spends $104 on shirts.