Z-scores are expressed in terms of standard deviations from their means. <span>The standard score is simply the score, minus the mean score, divided by the standard deviation. It is calculated as follows:
z = X- mean / standard deviation
z = 2.7 - 2.4 / 1.5
z = 0.2</span>
32, 38, so on. So its +4 then +8 then +12 +16 +20....
Probablity of selecting a red marble= 35%
Probablity of not selecting a red marble= 100%-35%
=65%
Hope it helps you. Please mark brainliest.
