How to plot two histograms together in Matplotlib?

# importing libraries
import matplotlib.pyplot as plt
import numpy as np

# generating two series of random 
# values using numpy random module 
# of shape (500,1)
series1 = np.random.randn(500, 1)
series2 = np.random.randn(400, 1)

# plotting first histogram
plt.hist(series1)

# plotting second histogram
plt.hist(series2)

# Showing the plot using plt.show()
plt.show()

# importing libraries
import matplotlib.pyplot as plt
import numpy as np
from numpy.lib.histograms import histogram

# generating two series of random values 
# using numpy random module of shape (500,1)
series1 = np.random.randn(500, 1)
series2 = np.random.randn(400, 1)

# plotting first histogram
plt.hist(series1, label='series1', alpha=.8, edgecolor='red')

# plotting second histogram
plt.hist(series2, label='series2', alpha=0.7, edgecolor='yellow')
plt.legend()

# Showing the plot using plt.show()
plt.show()

# importing libraries
import matplotlib.pyplot as plt

# giving two age groups data
age_g1 = [1, 3, 5, 10, 15, 17, 18, 16, 19,
          21, 23, 28, 30, 31, 33, 38, 32, 
          40, 45, 43, 49, 55, 53, 63, 66, 
          85, 80, 57, 75, 93, 95]

age_g2 = [6, 4, 15, 17, 19, 21, 28, 23, 31, 
          36, 39, 32, 50, 56, 59, 74, 79, 34, 
          98, 97, 95, 67, 69, 92, 45, 55, 77,
          76, 85]

# plotting first histogram
plt.hist(age_g1, label='Age group1', bins=14, alpha=.7, edgecolor='red')

# plotting second histogram
plt.hist(age_g2, label="Age group2", bins=14, alpha=.7, edgecolor='yellow')
plt.legend()

# Showing the plot using plt.show()
plt.show()

# importing libraries
import matplotlib.pyplot as plt

# giving two age groups data
age_g1 = [1, 3, 5, 10, 15, 17, 18, 16, 19, 21,
          23, 28, 30, 31, 33, 38, 32, 40, 45, 
          43, 49, 55, 53, 63, 66, 85, 80, 57, 
          75, 93, 95]

age_g2 = [6, 4, 15, 17, 19, 21, 28, 23, 31, 36,
          39, 32, 50, 56, 59, 74, 79, 34, 98, 97,
          95, 67, 69, 92, 45, 55, 77, 76, 85]

# plotting first histogram
plt.hist(age_g1, label='Age group1', alpha=.7, color='red')

# plotting second histogram
plt.hist(age_g2, label="Age group2", alpha=.5,
         edgecolor='black', color='yellow')
plt.legend()

# Showing the plot using plt.show()
plt.show()