Some boys are sitting in a row. P is at the 14th position from the left end, and Q is at the 7th position from the right end. If there are 4 boys sitting between P and Q, then how many boys are there in total in the row?

Some boys are sitting in a row. P is at the 14th position from the left end, and Q is at the 7th position from the right end. If there are 4 boys sitting between P and Q, then how many boys are there in total in the row?
कुछ लड़के पंक्ति में बैठे हुए हैं P बाई तरफ से 14 वे स्थान पर और Q दाएं तरफ से से सातवें स्थान पर बैठा है यदि 4 लड़के इन दोनों के बीच बैठे हैं, तो पंक्ति में कुल कितने लड़के बैठे हैं |