The 98% is confidence interval its not a probability estimate. The probability will be different from the confidence interval. Confidence interval is about the population mean and is not calculated based on sample mean. Every confidence interval contains the sample mean. There is 98% confidence that the proportion of Drosophola with his mutation is between 0.34 and 0.38.
0.10x+0.25(x+3)=1.80 <span>0.10x+0.25x+0.75=1.80 </span> <span>0.35x=1.80-0.75=1.05 </span> <span>x=1.05/0.35=3 </span> <span>Therefore,Vonda has 3 dimes and 6 quarters with her </span>
