Vinayak ate $\large\frac{1}{6}$ of a pizza and his friend Bala ate $\large\frac{8}{15}$ of the pizza. How much total pizza did they eat altogether?
( A ) $\large\frac{6}{10}$
( B ) $\large\frac{7}{10}$
( C ) $\large\frac{7}{2}$
( D ) $\large\frac{3}{2}$