Please help quick!
jake has a bag of 50 beads some of which are blue and the remaining are green. jake randomly pulls out a bead from the bag, records the color, and replaces it in the bag. jake has already recorded 16 blue and 4 green beads. Based on these results, what is most likely the number of blue beads in the bag?
A) 10
B) 20
C) 30
D)40

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.