Gmat Score Probability
1. **State the problem:** We want to find the probability that a person scores above 500 on the GMAT, given that scores are normally distributed with mean $\mu = 527$ and standard deviation $\sigma = 112$.
2. **Convert the score to a z-score:** The z-score formula is
$$z = \frac{X - \mu}{\sigma}$$
where $X=500$. So,
$$z = \frac{500 - 527}{112} = \frac{-27}{112} \approx -0.2411$$
3. **Find the cumulative probability for z:** Using normal distribution tables or a calculator, find $P(Z \leq -0.2411)$. The cumulative probability is about 0.4046 or 40.46%.
4. **Calculate the probability of scoring above 500:**
Since $P(Z \leq z)$ is the probability of scoring below 500,
$$P(X > 500) = 1 - P(Z \leq -0.2411) = 1 - 0.4046 = 0.5954$$
5. **Convert probability to percent form:**
$$0.5954 \times 100 = 59.54$$
**Final answer:** The probability of scoring above 500 on the GMAT is **59.54** percent.