Step 1 :\(p_{m} = \frac{0.10}{1}\)
Step 2 :\(p_{w}= \frac{0.60}{1}\)
Step 3 :\(n_{m} = 180, n_{w} = 60\)
Step 4 :\(p_c = \frac{0.10 * 180 + 0.60 * 60 }{180 + 60}\)
Step 5 :\(q_c = 1 - p_c\)
Step 6 :\(z = \frac{(p_{m} - p_{w}) - 0}{\sqrt{\dfrac{p_c * q_c}{n_{m}} + \dfrac{p_c * q_c}{n_{w}}}}\)
Step 7 :\(z \approx -20.58\)